When the Messenger of Allah ﷺ got up to offer voluntary prayers at night, he would say when he prostrated: "Allahumma laka sajadtu wa bika amantu wa laka aslamtu, Allahumma anta Rabbi, sajada wajhi lilladhi khalaqahu wa sawwarahu wa shaqqa sam'ahu wa basarahu, tabarak Allahu ahsanul-khaliqin ( O Allah, to You I have prostrated and in You I have believed and to You I have submitted. O Allah, You are my Lord. My face has prostrated to the One Who created it and formed it, and brought forth its hearing and sight. Blessed be Allah the best of Creators.)"  

أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ إِذَا قَامَ مِنَ اللَّيْلِ يُصَلِّي تَطَوُّعًا قَالَ إِذَا سَجَدَ اللَّهُمَّ لَكَ سَجَدْتُ وَبِكَ آمَنْتُ وَلَكَ أَسْلَمْتُ اللَّهُمَّ أَنْتَ رَبِّي سَجَدَ وَجْهِي لِلَّذِي خَلَقَهُ وَصَوَّرَهُ وَشَقَّ سَمْعَهُ وَبَصَرَهُ تَبَارَكَ اللَّهُ أَحْسَنُ الْخَالِقِينَ