Berean Standard Bible (BSB)
They went out from us, but they did not belong to us. For if they had belonged to us, they would have remained with us. But their departure made it clear that none of them belonged to us.
World English Bible (WEB)
They went out from us, but they didn’t belong to us; for if they had belonged to us, they would have continued with us. But they left, that they might be revealed that none of them belong to us.
Strong's King James
They went out{G1831}{(G5627)} from{G1537} us{G2257}, but{G235} they were{G2258}{(G5713)} not{G3756} of{G1537} us{G2257}; for{G1063} if{G1487} they had been{G2258}{(G5713)} of{G1537} us{G2257}, they would{G302} no doubt have continued{G3306}{(G5715)} with{G3326} us{G2257}: but{G235} they went out, that{G2443} they might be made manifest{G5319}{(G5686)} that{G3754} they were{G1526}{(G5748)} not{G3756} all{G3956} of{G1537} us{G2257}.
The F.O.G *
They went out from us, but they were not of us; for if they had been of us, they would have remained with us. But their departure was to reveal that not all of them were of us.
The F.O.G Message *
They went out from us, but they never truly belonged to us; for if they had, they would have remained with us. Their departure proves that they did not truly belong.
Young's Literal Translation
out of us they went forth, but they were not of us, for if they had been of us, they would have remained with us; but—that they might be manifested that they are not all of us.