Only followers of this user (@techstartupmom) can see their posts
By asking him to sacrifice Isaac, God was testing Abraham to see if he trusted Him. And he did: Abraham's faith in God was so great that he was willing to give Him his only son, trusting that God could bring him back from the dead.
It was God.
Learn more by reading here:
https://bibleproject.com/blog/why-did-god-ask-abraham-to-sacrifice-isaac/