Called — Who are Israelites in name, but not in truth. Are come — From the lineage of your progenitor, Judah, as waters flow from a fountain. Swear — Who profess the true religion; (one act of religion being put for all) and call themselves by his name.
Related Commentaries of Isaiah 48:1
Isaiah 48:1
1 Hear ye this, O house of Jacob, which are called by the name of Israel, and are come forth out of the waters of Judah, which swear by the name of the LORD, and make mention of the God of Israel, but not in truth, nor in righteousness.