Sunan Abi Dawud 979
سنن أبي داود#979SahihAbu Humaid al-Said said:Some people asked: Messenger of Allah, how should we invoke blessings on you? He said: Say,” O Allah, bless Muhammad, his wives and his off springs, as Thou didst bless Abraham’s family, and grant favours to Muhammad’s family, his wives and off springs, as Thou didst grant favours to Abraham’s family. Thou art indeed praiseworthy and glorious
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Bukhari (3369) Sahih Muslim (407)
In-book reference: 2:590