Tarry here, I pray thee Elijah seems to have said this only with a view to try Elisha, whether he would accompany him to the last, and be the witness of his translation. And Elisha certainly, by not leaving him, testified, both great fidelity to his master, and great faith in what God had revealed respecting the taking him up to heaven.
Related Commentaries of 2 Kings 2:4
2 Kings 2:4
4 And Elijah said unto him, Elisha, tarry here, I pray thee; for the LORD hath sent me to Jericho. And he said, As the LORD liveth, and as thy soul liveth, I will not leave thee. So they came to Jericho.