اَللَّهُمَّ أَعِنِّى عَلَى ذِكْرِكَ وَشُكْرِكَ وَحُسْنِ عِبَادَتِكَ

Allaahumma 'a'innee 'alaa dhikrika, wa shukrika, wahusni 'ibaadatik

O Allah, help me to remember You, to give You thanks, and to perform Your worship in the best manner. Mu'adh bin Jabal (RA) reported that the Messenger of Allah (ﷺ) caught his hand and said: By Allah, I love you, Mu'adh. I give some instruction to you. Never leave to recite this supplication after every (prescribed) prayer.

Reference: Sahih (Albani). Abu Dawud: 1522