اللَّهُمَّ اكْتُبْ لِي بِهَا عِنْدَكَ أَجْراً، وَضَعْ عَنِّي بِهَا وِزْراً، وَاجْعَلْهَا لِي عِنْدَكَ ذُخْراً، وَتَقَبَّلَهَا مِنِّي كَمَا تَقَبَّلْتَهَا مِنْ عَبْدِكَ دَاوُدَ

O Allāh, record for me a reward for this (prostration), and remove from me a sin. Save it for me and accept it from me just as You had accepted it from Your servant Dāwud.

Reference: Al-Tirmidhī (#579, 2/473) and al-Hākim declared it ṣaḥīḥ and al-Dhahabī agreed with him (1/219).