Prostration and its Excellence - Section 1 Mishkat al-Masabih 892
Arabic hadith text
وَعَنْ أَبِي هُرَيْرَةَ قَالَ: كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُولُ فِي سُجُودِهِ: «اللَّهُمَّ اغْفِرْ لِي ذَنْبِي كُلَّهُ دِقَّهُ وَجِلَّهُ وَأَوَّلَهُ وَآخره وعلانيته وسره» . رَوَاهُ مُسلم
Translation
Abu Huraira said that the Prophet used to say when prostrating himself, “O God, forgive me all my sins, small and great, first and last, open and secret.” Muslim transmitted it.