Romans 11:21

don’t boast over the branches. But if you boast, remember that it is not you who support the root, but the root supports you.

You will say then, “Branches were broken off, that I might be grafted in.”

True; by their unbelief they were broken off, and you stand by your faith. Don’t be conceited, but fear;

See then the goodness and severity of God. Toward those who fell, severity; but toward you, goodness, if you continue in his goodness; otherwise you also will be cut off.

They also, if they don’t continue in their unbelief, will be grafted in, for God is able to graft them in again.

For if you were cut out of that which is by nature a wild olive tree, and were grafted contrary to nature into a good olive tree, how much more will these, which are the natural branches, be grafted into their own olive tree?