Ya'qub bin Ibrahim narrates from his father: It reached us that Sayyiduna Ammar bin Yasir (may Allah be pleased with him) said: "I was of the same age as the Messenger of Allah (peace and blessings be upon him); no one was closer to him in age than I was (that is, we were both born in the same period)."

It is narrated from al-Hakam bin Utaybah that when the Messenger of Allah (peace and blessings be upon him) first came to Madinah, Sayyiduna Ammar bin Yasir (may Allah be pleased with him) said: It is essential that the Messenger of Allah (peace and blessings be upon him) have a place where, after his midday rest, he (peace and blessings be upon him) can take shade and offer prayer. So Sayyiduna Ammar (may Allah be pleased with him) gathered stones and built the Mosque of Quba. Thus it is the first mosque that was built, and Sayyiduna Ammar (may Allah be pleased with him) built it.

It is narrated from al-Qasim bin Abd al-Rahman that the first person to build a mosque in which prayer was offered was Sayyiduna Ammar bin Yasir (may Allah be pleased with him).

It is narrated from Asim bin Umar, concerning the names of those Companions among the Muhajirun and the Ansar between whom the Messenger of Allah (peace and blessings be upon him) established brotherhood (mu'akhah), that he said: The Messenger of Allah (peace and blessings be upon him) established brotherhood between Sayyiduna Ammar bin Yasir and Sayyiduna Hudhayfah bin al-Yaman (may Allah be pleased with them both). Abdullah bin Ja'far said: Although Sayyiduna Hudhayfah (may Allah be pleased with him) was not able to take part in Badr, his Islam was very early. And they all agree that Sayyiduna Ammar bin Yasir (may Allah be pleased with him) took part in Badr, Uhud, the Trench (Khandaq) and all the battles alongside the Messenger of Allah (peace and blessings be upon him).

It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that he said: On the day of the Battle of Yamamah I saw Sayyiduna Ammar bin Yasir (may Allah be pleased with him) on a rock, calling out from the height: "O company of Muslims! Are you fleeing from Paradise? I am Ammar bin Yasir! Are you fleeing from Paradise? I am Ammar bin Yasir! Come to me!" I was looking at him, and one of his ears had been cut off and was dangling, while he was fighting with the utmost ferocity.

It is narrated from Lu'lu'ah, the slave-girl of Umm al-Hakam, the daughter of Sayyiduna Ammar bin Yasir (may Allah be pleased with him), that on the day Sayyiduna Ammar bin Yasir (may Allah be pleased with him) was martyred, the banner was held by Abu Hashim bin Utbah. By the time of Asr that day, many of the companions of Sayyiduna Ali (may Allah be pleased with him) had been killed. Then Sayyiduna Ammar advanced and saw that Abu Hashim was ahead of him. At that time the sun was close to setting, and Sayyiduna Ammar (may Allah be pleased with him) had with him milk mixed with water (dayh), and he was waiting for the sun to set in order to break his fast. As soon as the sun set, he drank that milk and said: I heard the Messenger of Allah (peace and blessings be upon him) say: "Your last provision from this world will be a draught of milk." The narrator said: Then he advanced and fought until he was martyred, and at that time he was ninety-four years old.

It is narrated from Umarah bin Khuzaymah bin Thabit that his father, Sayyiduna Khuzaymah bin Thabit (may Allah be pleased with him), was present at the Battle of the Camel but did not draw his sword. Then he took part in the Battle of Siffin and said: I will never go astray until Ammar is killed; then I will see who kills him, for I heard the Messenger of Allah (peace and blessings be upon him) say: "A rebellious group will kill you." So when Sayyiduna Ammar was martyred, Sayyiduna Khuzaymah said: Now (the truth) has become clear to me. Then he advanced and fought until he was martyred. The one who killed Sayyiduna Ammar (may Allah be pleased with him) was Abu Ghadiyah al-Muzani, who struck him with a spear and he fell; on that day he was fighting at the age of ninety-four. When he fell to the ground, another man rushed at him and severed his blessed head. Then the two of them came quarrelling, each claiming: I killed him. Sayyiduna Amr bin al-As (may Allah be pleased with him) said: "By Allah! These two are quarrelling over nothing but the Fire." Sayyiduna Mu'awiyah (may Allah be pleased with him) heard this, and when the two men had left, he said to Amr bin al-As: "I have never seen the like of what you did! A people sacrificed their lives for us, and you tell them that they are quarrelling over the Fire?" Sayyiduna Amr bin al-As (may Allah be pleased with him) said: "By Allah! That is exactly how it is, and by Allah, you too know this. And I wish that I had died twenty years before this event."

Muhammad bin Umar said: Abdullah bin Ja'far narrated to me from Ibn Abi Awn that Sayyiduna Ammar (may Allah be pleased with him) advanced when he was ninety-one years old, and he was older by birth than the Messenger of Allah (peace and blessings be upon him). Three men advanced towards him: Uqbah bin Amir al-Juhani, Umar bin al-Harith al-Khawlani and Sharik bin Salamah. They all reached him while Sayyiduna Ammar was saying: "By Allah! Even if you were to beat us until you drove us as far as the palm branches of Hajar, we would still know that we are upon the truth and you are upon falsehood." Then they all attacked him together and martyred him. Some people claim that it was Uqbah bin Amir who killed him, while it is also said that it was Umar bin al-Harith al-Khawlani who killed him.

Muhammad bin Umar said: What is agreed upon concerning Sayyiduna Ammar (may Allah be pleased with him) is that he was martyred alongside Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) at Siffin in Safar of the year 37 AH, when he was ninety-three years old, and he was buried there at Siffin.

Rabi'ah bin Kulthum narrates from his father that he said: I was at Wasit al-Qasab in the house of Abd al-A'la bin Abdullah bin Amir when the doorkeeper said: This is Abu Ghadiyah al-Juhani asking permission to enter. Abd al-A'la said: Bring him in. When he entered, he was wearing short garments; he was a tall, lean man who did not look like the people of this Ummah. When he sat down he said: We used to count Ammar bin Yasir among the best of us. Then he said: By Allah! I was in the Mosque of Quba when suddenly he said something such that, had I found any helpers against him, I would have trampled him until I killed him. Then, on the day of Siffin, he (Ammar) came walking on foot at the head of the battalion, until, between the two ranks, a man was struck with a spear and fell, and the helmet slipped off him. I struck him, and behold, it was the head of Ammar bin Yasir. The narrator said: A freedman of ours said: I have not seen a man more manifestly misguided than him (Abu Ghadiyah).