مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3541
Musnad of Abdullah bin Mas'ood
It was narrated from Abul-Ahwas that ‘Abdullah (رضي الله عنه) said: The Messenger of Allah (ﷺ) said: "A man's prayer in congregation is twenty-odd times better than his praying alone.”
Musnad Ahmad 3564Saheeh because of corroborating evidence, and its isnad is d