Dua 5
اَللّٰهُمَّ اَعِنِّيْ عَلٰى ذِكْرِكَ وَشُكْرِكَ وَحُسْنِ عِبَادَتِكَ
O Allah! Help me to remember You, to thank You and to worship You well.
Sahih, Sunan Abi Dawud, no. (1522), Sunan an-Nasa'i, no. (1303), and al-Albani graded it Sahih in “Sahih Abi Dawud” (5/253) no. (1362).
Sunan an-Nasa'i states clearly “في كل صلاة”, that is, saying it within the prayer, which explains the words of Sunan Abi Dawud “دبر كل صلاة”: they mean the last part within the prayer.