It is narrated from Sayyiduna al-Agharr al-Muzani (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "At times my heart too is overcome by heedlessness, and I seek forgiveness from Allah a hundred times a day."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13341