1 John 2:19

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.
BSB · Berean Standard 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.
KJV · King James Version
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.
WEB · World English Bible
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.
ASV · American Standard Version

Related passages

From the Treasury of Scripture Knowledge, grouped by the word they explain.

went out
Deuteronomy 13:13; Psalm 41:9; Matthew 13:20, 21; Mark 4:5, 6, 16, 17; Luke 8:13; John 15:2; Acts 15:24; Acts 20:30; 2 Peter 2:20, 21; Jude 1:19
for
Job 17:9; Psalm 37:28; Psalm 125:1, 2; Jeremiah 32:38–40; Matthew 24:24; Mark 13:22; John 4:14; John 6:37–39; John 10:28–30; 2 Timothy 2:10, 19; 1 Peter 1:2–5; Jude 1:1
they might
Romans 9:6; Romans 11:5, 6; 1 Corinthians 11:19; 2 Timothy 3:9; Hebrews 10:39