'Servant's' in the Bible

And yet this was a small thing in thine eyes, O God; for thou hast also spoken of thy servant's house for a great while to come, and hast regarded me according to the estate of a man of high degree, O LORD God.

O LORD, for thy servant's sake, and according to thine own heart, hast thou done all this greatness, in making known all these great things.

For you, O my God, have let your servant see that you will make him head of a line of kings; and so it has come into your servant's heart to make his prayer to you.

So now, You have been pleased to bless Your servant’s house that it may continue before You forever. For You, Lord, have blessed it, and it is blessed forever.

David said to God, “I have sinned greatly because I have done this thing. Now, please take away Your servant’s guilt, for I’ve been very foolish.”