´It was narrated from Aishah that:` When the Messenger of Allah (ﷺ) sat in a gathering or prayed, he said some words, and 'Aishah asked him about those words. He said: "If he has spoken some good words (and he says this statement of remembrance), it will be a seal for them to preserve them until the Day of Resurrection, and if he has said something other than that, it (these words) will be an expiation for him: 'Subhanak Allahumma wa bihamdika, astaghfiruka wa atubu ilayk (Glory and praise be to You, O Allah, I seek Your forgiveness and I repent to You.)'"
Explanation & Benefits
Hafiz Muhammad Ameen
1345. Commentary:
➊ This supplication is called the "expiation of the gathering" (kafarat al-majlis), therefore it should be recited after every gathering.
➋ "They will become a seal," meaning they will preserve the reward of these good words, guarantee their acceptance, and will not allow them to be rejected.
Source: Sunan Nasa'i: Translation and Benefits by Shaykh Hafiz Muhammad Amin Hafizullah, Page: 1345