'Service' in the Bible

Sacrifice and meal offering You do not desire, nor do You delight in them;You have opened my ears and given me the capacity to hear [and obey Your word];Burnt offerings and sin offerings You do not require.

But the king will rejoice in God;Everyone who swears by Him [honoring the true God, acknowledging His authority and majesty] will glory,For the mouths of those who speak lies will be stopped.

Your God has commanded your strength [your power in His service and your resistance to temptation];Show Yourself strong, O God, who acted on our behalf.

For He will command His angels in regard to you,To protect and defend and guard you in all your ways [of obedience and service].