Dua in Obligatory sajda in Quran
1108 When a person performs the obligatory Sajdah upon hearing the relevant verse, it will be sufficient even if he does not recite any Zikr.
However, it is Mustahab to recite Zikr, preferably the following:
La ilaha illal lahu haqqan haqqa; La ilaha illal lahu imanan wa tasdiqa; la ilaha illal lahu 'ubudiyyatan wa riqqa; Sajadtu laka ya Rabbi ta'abbudan wa riqqa la mustankifan wa la mustak biran bal ana 'abdun zalilun za'ifun kha'ifun mustajir.
لَا إِلٰهَ إِلَّا اللَّهُ حَقّاً حَقّاً لَا إِلٰهَ إِلَّا اللَّهُ إِيمَاناً وَ تَصْدِيقاً لَا إِلٰهَ إِلَّا اللَّهُ عُبُودِيَّةً وَ رِقّاً سَجَدْتُ لَكَ يَا رَبِّ تَعَبُّداًوَ رِقّاً لَا مُسْتَنْكِفاً وَ لَا مُسْتَكْبِراً بَلْ أَنَا عَبْدٌ ذَلِيلٌ خَائِفٌ مُسْتَجِيرٌ