Sunan Abi Dawud — General Behavior (Kitab Al-Adab) — Hadith No: 4871

Narrated AbuHurayrah: The Prophet (ﷺ) said: People who get up from an assembly in which they did not remember Allah will be just as if they had got up from an ass's corpse, and it will be a cause of grief to them

A similar tradition has also been transmitted by Abu Hurairah from the Prophet (ﷺ) through a different chain of narrators

Narrated AbuBarzah al-Aslami: When the Messenger of Allah (ﷺ) intended to get up from the assembly he used to say in the last. Glory be to Thee. O Allah, and I begin with praise of Thee, I testify that there is no god but Thou; I ask Thy pardon, and return to Thee in repentance. The man asked: Messenger of Allah! you utter the words now which you did not do in the past? He replied: (This is an) atonement for what takes place in the assembly

Narrated Amr ibn al-Faghwa' al-Khuza'i: The Messenger of Allah (ﷺ) called me. He intended to send me with some goods to AbuSufyan to distribute among the Quraysh at Mecca after the conquest. He said: Search for a companion. Then Amr ibn Umayyah ad-Damri came to me and said: I have been told that you are intending to make a journey and are seeking a companion. I said: Yes. He said: I am your companion. I then went to the Messenger of Allah (ﷺ) and said: I have found a companion. He asked: Who is he? I replied: Amr ibn Umayyah ad-Damri. He said: When you come down to the territory of his people, be careful of him, for a maxim says: If one is your real brother, do not feel safe with him. So we proceeded, and when I reached al-Abwa', he said to me: I have some work with my people at Waddan, so stay here till I come back. I said: Do not lose your way. When he turned his back, I recalled the words of the Prophet (ﷺ). So I rode my camel and galloped without stopping. When I reached al-Asafir, he was pursuing me with a group of men. So I galloped and forged ahead of him. When he saw me that I had outstripped him, they returned and he came to me. He said to me: I had some work with my people. I said: Yes. We then went on until we reached Mecca, and I gave the goods to AbuSufyan