Reference : Hisn al-Muslim 47

اللّهُـمَّ إِنِّـي أَعـوذُ بِرِضـاكَ مِنْ سَخَطِـك ، وَبِمعـافاتِـكَ مِنْ عُقوبَـتِك ، 
وَأَعـوذُ بِكَ مِنْـك ، 
لا أُحْصـي ثَنـاءً عَلَـيْك ، 
أَنْـتَ كَمـا أَثْنَـيْتَ عَلـى نَفْسـِك
Allāhumma innī a`ūdhu biriḍāka min sakhaṭika, 
wa bimu`āfātika min `uqūbatika 
wa a`ūdhu bika minka
lā uḥṣī thanā'an `alayka 
anta kamā athnayta `alā nafsika.


O Allah, I seek protection in Your pleasure from Your anger,
and I seek protection in Your forgiveness from Your punishment. 
I seek protection in You from You. 
I cannot count Your praises. 
You are as You have praised Yourself.

Reference:
Muslim 1/352.

Chapter: While prostrating