854/1117 (Hasan al-Isnad) from Ibn Abbas who said: "Indeed, I see that replying to a letter is a right just as replying to salam."

855/1118 (Hasan al-Isnad) from Aisha bint Talha who said: I said to Aisha – while I was in her care – and people used to come to her from every region, so the elders would visit me(1) because of my position with her, and the youth would befriend me(2), so they would gift me and write to me from the regions. So I would say to Aisha: O aunt! This is the letter of so-and-so and his gift. So Aisha would say to me: "O daughter! Then respond to him and reward him; and if you have nothing to reward with, I will give you." She said: So she would give me.

856/1119 (Authentic chain of narration) From Abdullah ibn Dinar; that Abdullah ibn Umar wrote to Abd al-Malik ibn Marwan pledging allegiance to him, so he wrote to him: In the name of Allah, the Most Gracious, the Most Merciful, to Abd al-Malik, Commander of the Faithful, from Abdullah ibn Umar: Peace be upon you; indeed, I praise Allah to you, there is no deity except Him, and I acknowledge to you hearing and obedience according to the Sunnah of Allah and the Sunnah of His Messenger, as much as I am able.

857/1120 (Authentic chain) From Zayd ibn Aslam who said: My father sent me to Ibn Umar, and I saw him writing: "In the name of Allah, the Most Gracious, the Most Merciful. To proceed: ".

858/1121 (Sahih li-ghayrih) from Hisham ibn Urwah who said: I saw letters from the letters of the Prophet, peace be upon him; whenever a section ended, he said: "Amma ba'd."

From the elders of the family of Zayd ibn Thabit, that Zayd ibn Thabit wrote with this letter: In the name of Allah, the Most Gracious, the Most Merciful, to Abdullah Muawiya, Commander of the Faithful, from Zayd ibn Thabit. Peace be upon you, Commander of the Faithful, and the mercy of Allah. Indeed, I praise to you Allah, there is no deity except Him. To proceed.

From Abu Mas‘ud al-Jurayri who said: A man asked al-Hasan about the recitation of“Bismillah al-Rahman al-Rahim.”He said: That is at the beginning of letters.

861/1124 (Authentic chain) From Nafi‘ who said: Ibn ‘Umar had a need with Mu‘awiya, so he wanted to write to him. They said: Begin with him! They kept insisting until he wrote: "(In the name of Allah, the Most Merciful, the Most Compassionate) to Mu‘awiya."

862/1125 (Authentic chain) From Anas ibn Sirin who said: I wrote to Ibn Umar, and he said: Write (In the name of Allah, the Most Gracious, the Most Merciful), as for what follows: to so-and-so." And in another narration from him he said: "A man wrote in the presence of Ibn Umar (In the name of Allah, the Most Gracious, the Most Merciful) to so-and-so, so Ibn Umar forbade him and said: 'Say: In the name of Allah, it is for him.'" (1).

863/1129 (Sahih) From Mahmoud ibn Labid who said: When the median vein of Sa'd was injured on the day of the Trench and his condition worsened, they moved him to a woman called Rufaydah, and she used to treat the wounded. So whenever the Prophet, peace be upon him, passed by him, he would say: "How are you this evening?" and when morning came: "How are you this morning?" and he would inform him.