'Servant's' in the Bible

And this was only a small thing to you, O Lord God; but your words have even been about the far-off future of your servant's family, O Lord God!

For you, O Lord of armies, the God of Israel, have clearly said to your servant, I will make you the head of a family of kings: and so it has come into your servant's heart to make this prayer to you.

So may it be your pleasure to give your blessing to the family of your servant, so that it may go on for ever before you: (for you, O Lord God, have said it,) and may your blessing be on your servant's family line for ever!

Your servant's desire was only to take the king over Jordan; why is the king to give me such a reward?

And he came near, and the woman said, Are you Joab? And he said in answer, I am. Then she said, Give ear to your servant's words. And he said, I am giving ear.