This hadith has been narrated on the authority of Safwan b. 'Abdullah b. Safwan with the same chain of transmitters.
Sahih Muslim Book 48, Hadith 122
← Previous Hadith I visited Abu Darda's house in Syria. I did not find him there but Umm Darda' (was present at the house). She said: Do you intend to perform Hajj during this year? I said: Yes. She said: Do supplicate Allah for blessings upon us, for Allah's Apostle (may peace be upon hiin) used to say: The supplication of a Muslim for his brother at his back (in his absence) is responded so long as he makes a supplica- tion for blessings for his brother and the commissioned Angel says: Amen, and says: May it be for you too I I went to the bazar and met Abfi Dardi' and he narrated like this from Allah's Messenger (ﷺ).

Sahih Muslim Book 48, Hadith 121 Next Hadith → Allah is pleased with His servant who says: Al-Hamdu lillah while taking a morsel of food and while drinking.

Sahih Muslim Book 48, Hadith 123