Du'a after every prayer

اللَّهُمَّ أَعِنِّي عَلَى ذِكْرِكَ، وَشُكْرِكَ، وَحُسْنِ عِبَادَتِكَ

Allahumma a'inni 'ala dhikrika wa shukrika wa husni 'ibadatik

O Allah! Help me to remember You, thank You, and worship You in the best of manners.

Sunan Abī Dāwūd 1522