His supplication recited standing in Watr prayer

In the name of Allah, the Beneficent, the Merciful O my Lord! I am a sinner, I have done oppression on my self, and whatever I have done is wrong, now both these hands are presented for punishment, and the neck is bowed down due to my sins and now I have presented myself in Your presence. So for my sake snatch away the happiness from me, so that You love my actions and then I never repeat such deeds again. (Then recite 300 times) 'Al-Afw' (forgive me) then say - O Allah pardon me, have Mercy on me, accept my repentance, as You are the only one to accept repentance and bestow Mercy.