Berean Study Bible
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.

King James Bible
They went out from us, but they were not of us; for if they had been of us, they would no doubt have continued with us: but they went out, that they might be made manifest that they were not all of us.

American Standard Version
They went out from us, but they were not of us; for if they had been of us, they would have continued with us: but they went out , that they might be made manifest that they all are not of us.

Darby Bible Translation
They went out from among us, but they were not of us; for if they had been of us, they would have surely remained with us, but that they might be made manifest that none are of us.

Douay-Rheims Bible
They went out from us, but they were not of us. For if they had been of us, they would no doubt have remained with us; but that they may be manifest, that they are not all of us.

English Revised Version
They went out from us, but they were not of us; for if they had been of us, they would have continued with us: but they went out, that they might be made manifest how that they all are not of us.

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.