'Service' in the Bible

Saul sent word to Jesse, saying, “Please let David be my attendant, for he has found favor in my sight.”

The men of Israel said, “Have you seen this man who is coming up? Surely he is coming up to defy Israel. The king will reward the man who kills him with great riches, and will give him his daughter [in marriage] and make his father’s house (family) free [from taxes and service] in Israel.”

Then Jonathan spoke well of David to Saul his father and said to him, “May the king not sin against his servant David, since he has not sinned against you, and since his deeds have been very beneficial to you.