Where did Elijah go after eating the angel's food?

Answer: Mount Horeb

Strengthened by that food, Elijah walked forty days and forty nights to Horeb, the mountain of God.

“So he got up and ate and drank. And strengthened by that food, he walked forty days and forty nights until he reached Horeb, the mountain of God.”— 1 Kings 19:8 (BSB)