Musnad Ahmad 28:588

Qutaybah narrated to us, Ibn Lahi'ah narrated to us, from 'Amir ibn Yahya, from Abu 'Abd al-Rahman al-Hubuli, from 'Abdullah ibn 'Amr ibn al-'As, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "The scales will be set up on the Day of Resurrection. A man will be brought and placed in a pan, and what was recorded against him will be placed [in the other], and the scale will tip against him." He said: "He will be sent to the Fire. But as he is being taken away, a caller will call out from the presence of the Most Merciful, saying: 'Do not be hasty, do not be hasty, for there remains something for him.' Then a card will be brought containing: 'La ilaha illa Allah' (There is no god but Allah), and it will be placed with the man in the pan, until the scale tips in his favor."