Berean Standard Bible (BSB)
They promise them freedom, while they themselves are slaves to depravity. For a man is a slave to whatever has mastered him.
World English Bible (WEB)
promising them liberty, while they themselves are bondservants of corruption; for a man is brought into bondage by whoever overcomes him.
Strong's King James
While they promise{G1861}{(G5740)} them{G846} liberty{G1657}, they themselves{G846} are{G5225}{(G5723)} the servants{G1401} of corruption{G5356}: for{G1063} of whom{G3739} a man{G5100} is overcome{G2274}{(G5766)},{G2532} of the same{G5129} is he brought in bondage{G1402}{(G5769)}.
The F.O.G *
(19) Vowing to them freedom! While they themselves are slaves of the corruption because whatsoever someone is overcome by, this they are enslaved by.
The F.O.G Message *
Young's Literal Translation
liberty to them promising, themselves being servants of the corruption, for by whom any one hath been overcome, to this one also he hath been brought to servitude,