Narrated about the sons-in-law of the Prophet and one of them is Abu Al-'As bin Ar-Rabi'.
Vol: 005 Book: 057 Hadith: 075
A Selected Hadith
Narrated Anas:
The Prophet was the best of all the people in character. I had a brother called Abu 'Umar, who, I think, had been newly weaned. Whenever he (that child) was brought to the Prophet the Prophet used to...
O Allah, surely [name the person] is under Your protection, and in the rope of Your security, so save him from the trial of the grave and from the punishment of the Fire. You fulfil promises and grant rights, so forgive...
-> Read More Info: Ibn Majah, Abu Dawud 3/211. See also Al Albani, Sahih Ibn Majah 1/251.