Abu Al-Ahwas Al-Jashami narrates that one day Sayyiduna Ibn Mas'ud (may Allah be pleased with him) was delivering a sermon when suddenly his gaze fell upon a snake crawling on the wall. He stopped his speech and struck it with his staff until it died. Then he said: I heard the Prophet (peace and blessings be upon him) say, "Whoever kills a snake, it is as if he has killed a polytheist whose blood is lawful."

It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that once we asked the Prophet (peace and blessings be upon him): "Are these monkeys and pigs from among the descendants of the Jews?" The Prophet (peace and blessings be upon him) replied: "Whenever Allah cursed a people and transformed their forms, He did not leave any offspring of theirs after destroying them. Rather, this creation already existed before; when Allah's wrath descended upon the Jews and He transformed their forms, He made them like these."

It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that once I asked the Prophet (peace and blessings be upon him): "Which deed is most beloved to Allah?" The Prophet (peace and blessings be upon him) replied: "Performing prayer at its appointed time." I asked: "Then which?" He said: "Kindness to parents." I asked: "Then which?" He said: "Striving in the path of Allah." The Prophet (peace and blessings be upon him) mentioned these things to me, and if I had asked further, he would have answered me as well.

It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that I also know such examples that the Prophet (peace and blessings of Allah be upon him) recited two surahs in one rak'ah, among which are eighteen surahs from the Mufassalat and two surahs from Al-Ha-Meem.

Hadith number 3806 is also narrated through this second chain.

Sayyiduna Ibn Mas'ud (may Allah be pleased with him) narrates that once we were sitting in the Prophet’s Mosque on a Friday evening when an Ansari said: If any one of us sees a strange man with his wife and kills him, then you kill him in retaliation; if he speaks out, you flog him; and if he remains silent, he does so in anger. By Allah! If I am alive in the morning, I will surely ask the Prophet (peace and blessings be upon him) about this issue. So he asked the Prophet (peace and blessings be upon him) about this matter and said: O Messenger of Allah! If any one of us sees a strange man with his wife and kills him, then you kill him in retaliation; if he speaks out, you flog him; and if he remains silent, he does so in anger? O Allah! Decide (between us). So the verse of Li'an was revealed, and he was the first to be tested with it (this incident happened with him).

Abdur Rahman bin Yazid says that I saw Sayyiduna Ibn Mas'ud (may Allah be pleased with him) stoning the Jamrah 'Aqabah from the bottom of the valley, after which he said: By Him besides whom there is no deity, this is the very place where Surah Al-Baqarah was revealed to the Prophet (peace and blessings be upon him).

It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that I have performed two rak'ahs in Mina with the Prophet (peace and blessings of Allah be upon him), as well as with Sayyiduna Abu Bakr and Sayyiduna Umar (may Allah be pleased with them both).

It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that once we were with the Prophet (peace and blessings be upon him) in a cave, and there Surah Mursalat was revealed to the Prophet (peace and blessings be upon him). We began to memorize it after hearing it from the Prophet (peace and blessings be upon him). Suddenly, a snake came out of its hole. We quickly moved forward, but it outpaced us and went back into its hole. The Prophet (peace and blessings be upon him) said, "It has been saved from your harm just as you have been saved from its harm."

The previous hadith is also narrated through this second chain of transmission.