Romans 11:18

18notμὴboast overκατακαυχῶtheτῶνbranchesκλάδων·Ifεἰnowδὲyou boast against [them]κατακαυχᾶσαι,notοὐyouσὺtheτὴνrootῥίζανsupportβαστάζειςbutἀλλὰtheἡrootῥίζαyouσέ.

do not boast over the branches. But if you boast over [them], you do not support the root, but the root you.