1Corinthians 10:31 Whether therefore ye eat, or drink, or whatsoever ye do, do all to the glory of God.

Colossians 3:17 And whatsoever ye do in word or deed, do all in the name of the Lord Jesus, giving thanks to God and the Father by him.

Col 3:23 And whatsoever ye do, do it heartily, as to the Lord, and not unto men;

(the whole chapter 3 of Colossians deals with death to self)