Musannaf Ibn Abi Shaybah 32389 — Book of Faith

Alqamah (may Allah have mercy on him) said that a man said in the presence of Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him): "Indeed I am a believer." He (may Allah be pleased with him) said: "Then say: 'Indeed I am among the people of Paradise'!" And he said: "Rather, we believe in Allah, His angels, His Books and His Messengers."