Isaiah 19:19-21 World English Bible (WEB)
19 In that day, there will be an altar to Yahweh in the middle of the land of Egypt, and a pillar to Yahweh at its border. 20 It will be for a sign and for a witness to Yahweh of Armies in the land of Egypt; for they will cry to Yahweh because of oppressors, and he will send them a savior and a defender, and he will deliver them. 21 Yahweh will be known to Egypt, and the Egyptians will know Yahweh in that day. Yes, they will worship with sacrifice and offering, and will vow a vow to Yahweh, and will perform it.