'Here I Am' in the Bible

Now after these things, God tested [the faith and commitment of] Abraham and said to him, “Abraham!” And he answered, “Here I am.”

And Isaac said to Abraham, “My father!” And he said, “Here I am, my son.” Isaac said, “Look, the fire and the wood, but where is the lamb for the burnt offering?”

But the Angel of the Lord called to him from heaven and said, “Abraham, Abraham!” He answered, “Here I am.”

Now when Isaac was old and his eyes were too dim to see, he called his elder [and favorite] son Esau and said to him, “My son.” And Esau answered him, “Here I am.”

Israel (Jacob) said to Joseph, “Are not your brothers pasturing [the flock] at Shechem? Come, and I will send you to them.” And he said, “Here I am [ready to obey you].”