Chapter: After the last tashahhud and before salam

Status Reference : Hisn al-Muslim 59

اللّهُـمَّ أَعِـنِّي عَلـى ذِكْـرِكَ وَشُكْـرِك ،
وَحُسْـنِ عِبـادَتِـك

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English Translation:

Allāhumma ‘a`innī `alā dhikrika, wa shukrika,
wa ḥusni `ibādatik.

O Allah, help me to remember You, to give You thanks,
and to perform Your worship in the best manner.

Reference:
Abu Dawud 2/86, An-Nasa’i 3/53. See also Al-Albani Sahih Abu Dawud 1 /284.