After the prayer duas

The Prophet ﷺ never finished a prayer without it.

اللَّهُمَّ أَنْتَ السَّلَامُ وَمِنْكَ السَّلَامُ، تَبَارَكْتَ يَا ذَا الْجَلَالِ وَالْإِكْرَامِ

Allāhumma anta as-salām wa minka as-salām, tabārakta yā dhā al-jalāli wal-ikrām

O Allah, You are Peace and from You comes peace. Blessed are You, Owner of majesty and honour.

Preceded by saying Astaghfirullāh three times.

Asks for help with remembrance, thanks and worship itself.

اللَّهُمَّ أَعِنِّي عَلَى ذِكْرِكَ وَشُكْرِكَ وَحُسْنِ عِبَادَتِكَ

Allāhumma aʿinnī ʿalā dhikrika wa shukrika wa ḥusni ʿibādatik

O Allah, help me to remember You, to thank You, and to worship You in the best way.