Ahmad b. `Ali b. Ibrahim b. Hashim narrated to us. He said: My father narrated to us from my grandfather from Muhammad b. Abi `Umayr from Hisham b. Salim from Abi `Abdillah al-Sadiq Ja`far b. Muhammad . He said:

Whoever supplicates for forty believers before he supplicates for himself, his supplication will be granted for him.