It is narrated from Sayyiduna Hudhayfah (may Allah be pleased with him) that he recited this saying of Allah, the Mighty and Majestic: "So know that there is no god but Allah, and seek forgiveness for your sin" [Surah Muhammad: 19] , and said: I was somewhat sharp of tongue with my family, so I said: "O Messenger of Allah, I fear that my tongue will take me into Hell." At this the Prophet (peace and blessings be upon him) said: "Why are you heedless of seeking forgiveness (istighfar)?! I seek forgiveness from Allah a hundred times a day." This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it in this way.