'Here I Am' in the Bible

Here I am: testify against me before Jehovah, and before his anointed. Whose ox have I taken? or whose ass have I taken? or whom have I defrauded? whom have I injured? or of whose hand have I received any ransom and blinded mine eyes therewith? and I will restore it to you.

And Saul said, Hear now, son of Ahitub. And he answered, Here I am, my lord.