1 John 2:19

19 aThey went out from us, but they were not of us; for bif they had been of us, they would have continued with us. But they went out, cthat it might become plain that they all are not of us.

Jude 5

5Now I want dto remind you, although you once fully knew it, that eJesus, who saved
Some manuscripts  although you fully knew it, that the Lord who once saved
a people out of the land of Egypt, gafterward destroyed those who did not believe.
Copyright information for ESV