Musnad Ahmad 30:521

'Abd al-Razzaq narrated to us, Ma'mar informed us, from Suhayl ibn Abi Salih, from his father, from Abu Hurayrah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "The gates of Paradise are opened every Monday and Thursday." Ma'mar said: And someone other than Suhayl said: "And deeds are presented every Monday and Thursday, so Allah the Almighty forgives every servant who does not associate anything with Him, except for those who have animosity between them. Allah says to the angels: 'Leave these two until they reconcile.'"