Written by a celebrated and prolific 16th-century Islamic scholar, this treatise is a response to a questioner who asks about the rules for remembering God aloud and in a group. In his answer, Imam al-Suyyuti cites 25 prophetic traditions that justify and highly recommend collective prayer and remembrance. Never before available in English, this is an essential addition to the literature on Sufism and Islam's spiritual tradition. Thorough annotations and three appendices make the book accessible to both general readers and specialists.