It is narrated from Hazrat Abu Barzah Aslami (may Allah be pleased with him) that in the last days of his life, when any gathering would become lengthy, at the end, while standing up, the Prophet (peace and blessings be upon him) would say: "Subhanak Allahumma wa bihamdika, ash-hadu an la ilaha illa anta, astaghfiruka wa atubu ilaik." Once, one of us said, "We have never heard this phrase from you before?" The Prophet (peace and blessings be upon him) replied, "This is an expiation for the sins committed in the gathering."