'Here I Am' in the Bible

Behold, here I am. Witness 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 oppressed? Or from whose hand have I received a bribe, to blind my eyes with it? And I will restore it to you.

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