Though Ephraim multiplied the altars for sin, they became his altars for sinning.
Berean Standard Bible (BSB)
Because Ephraim has multiplied altars for sinning, they became for him altars for sinning.
World English Bible (WEB)
Because Ephraim{H669} hath made many{H7235}{(H8689)} altars{H4196} to sin{H2398}{(H8800)}, altars{H4196} shall be unto him to sin{H2398}{(H8800)}.
Strong's King James
Since Efrayim has multiplied altars for deviating, They have become altars of deviating to him.
The F.O.G
The F.O.G Message
Because Ephraim did multiply altars to sin, They have been to him altars to sin.
Young's Literal Translation