Musnad Ahmad 32:1852

'Abd al-Samad narrated to us, 'Amarah narrated to us, from Ziyad al-Numayri, from Anas ibn Malik, who said: When 'Abd Allah ibn Rawahah would meet a man from his companions, he would say: "Come, let us believe in our Lord for an hour." One day, he said this to a man, and the man became angry. He went to the Prophet, peace and blessings of Allah be upon him, and said: "O Messenger of Allah, do you not see Ibn Rawahah turning away from your faith to an 'hour of faith'?" The Prophet, peace and blessings of Allah be upon him, said: "May Allah have mercy on Ibn Rawahah; he loves the gatherings that the angels boast about."