Chapter 25: The Book on Food
Narrated Al-Mu' alla bin Rashid: "My grandmother, Umm 'Asim narrated to me - and she was the slave woman of Sinan bin Salamah - she said: 'Nubaishah Al-Khair entered upon us while we were eating from a large bowl. He narrated to us that the Messenger of Allah (ﷺ) said: "Whoever eats from A Qas' ah, then licks it, the Qas' ah will seek forgiveness for him."[Abu 'Eisa said: ] This Hadith is Gharib, we do not know of it except through the narration of Al-Mu' alla bin Rashid. And Yazid bin Harun and others among the A' immah reported this Hadith from Al-Mu' alla bin Rashid.
Jami at-Tirmidhi 1804