'Here I Am' in the Bible

Then Eli called Samuel and said, "Samuel, my son." And he answered, "Here I am."

Behold, here I am. Answer me before the LORD and before his anointed, whose ox have I taken? Or whose ass have I taken? Whom have I done wrong to? Or whom have I oppressed? And of whose hand have I received any bribe, to blind mine eyes therewith? And I will restore it you again."

And Saul said, "Hear, thou son of Ahitub." And he said, "Here I am, my lord."