2Kings 17:
[20] And the LORD rejected all the seed of Israel, and afflicted them, and delivered them into the hand of spoilers, until he had cast them out of his sight.
[21] For he rent Israel from the house of David; and they made Jeroboam the son of Nebat king: and Jeroboam drave Israel from following the LORD, and made them sin a great sin.
[22] For the children of Israel walked in all the sins of Jeroboam which he did; they departed not from them;
[23] Until the LORD removed Israel out of his sight, as he had said by all his servants the prophets. So was Israel carried away out of their own land to Assyria unto this day.
[24] And the king of Assyria brought men from Babylon, and from Cuthah, and from Ava, and from Hamath, and from Sepharvaim, and placed them in the cities of Samaria instead of the children of Israel: and they possessed Samaria, and dwelt in the cities thereof.
[25] And so it was at the beginning of their dwelling there, that they feared not the LORD: therefore the LORD sent lions among them, which slew some of them.
[26] Wherefore they spake to the king of Assyria, saying, The nations which thou hast removed, and placed in the cities of Samaria, know not the manner of the God of the land: therefore he hath sent lions among them, and, behold, they slay them, because they know not the manner of the God of the land.
[27] Then the king of Assyria commanded, saying, Carry thither one of the priests whom ye brought from thence; and let them go and dwell there, and let him teach them the manner of the God of the land.
[28] Then one of the priests whom they had carried away from Samaria came and dwelt in Bethel, and taught them how they should fear the LORD.
[29] Howbeit every nation made gods of their own, and put them in the houses of the high places which the Samaritans had made, every nation in their cities wherein they dwelt.
[30] And the men of Babylon made Succoth-benoth, and the men of Cuth made Nergal, and the men of Hamath made Ashima,
[31] And the Avites made Nibhaz and Tartak, and the Sepharvites burnt their children in fire to Adrammelech and Anammelech, the gods of Sepharvaim.
[32] So they feared the LORD, and made unto themselves of the lowest of them priests of the high places, which sacrificed for them in the houses of the high places.
[33] They feared the LORD, and served their own gods, after the manner of the nations whom they carried away from thence.
[34] Unto this day they do after the former manners: they fear not the LORD, neither do they after their statutes, or after their ordinances, or after the law and commandment which the LORD commanded the children of Jacob, whom he named Israel;
[35] With whom the LORD had made a covenant, and charged them saying, Ye shall not fear other gods, nor bow yourselves to them, nor serve them, nor sacrifice to them:
[36] But the LORD, who brought you up out of the land of Egypt with great power and a stretched out arm, him shall ye fear, and him shall ye worship, and to him shall ye do sacrifice.
[37] And the statutes, and the ordinances, and the law, and the commandment, which he wrote for you, ye shall observe to do for evermore; and ye shall not fear other gods.
[38] And the covenant that I have made with you ye shall not forget; neither shall ye fear other gods.
[39] But the LORD your God ye shall fear; and he shall deliver you out of the hand of all your enemies.
[40] Howbeit they did not hearken, but they did after their former manner.
[41] So these nations feared the LORD, and served their graven images, both their children, and their children's children: as did their fathers, so do they unto this day.
Verse 23 -- "until this day" meaning until 550 BC
verse 24: again, talking of 550 BC, not later
verse 27 talking of 550 BC - and those people are not only the ancestors of the Samaritans -- they very well may be, but the Samaritans also have Cohanim blood