New International Version 2 Timothy 2:
11 Here is a trustworthy saying:
If we died with him,
we will also live with him;
12 if we endure,
we will also reign with him.
If we disown him,
he will also disown us;
13if we are faithless,
he remains faithful,
for he cannot disown himself.
Had Paul read this from somewhere?
At least part of it is similar to Matthew 10:33
But whoever disowns me before others, I will disown before my Father in heaven.