The entering of Hamath was the northern border of the kingdom of Israel, Numbers 13:21, Numbers 34:8. Unto the sea of the plain, i.e. unto the Dead Sea, which once was a goodly plain, Genesis 13:10, which was their southern border. Jonah, or Jonas, one of the small prophets; though this prophecy of his be not recorded there; and therefore it is remembered here.
Related Commentaries of 2 Kings 14:25
2 Kings 14:25
25 He restored the coast of Israel from the entering of Hamath unto the sea of the plain, according to the word of the LORD God of Israel, which he spake by the hand of his servant Jonah, the son of Amittai, the prophet, which was of Gathhepher.