Musannaf Ibn Abi Shaybah 32467 — Book of Faith

Al-Jurayri (may Allah have mercy on him) said that Abdullah bin Shaqiq (may Allah have mercy on him) said: "The Companions (may Allah be pleased with them) did not regard a man as a disbeliever for abandoning any deed except prayer." The narrator said: They used to say: "Abandoning prayer is disbelief."