18 Boast not against the branches. But if thou boast, thou bearest not the root, but the root thee. 19 Thou wilt say then, The branches were broken off, that I might be graffed in. 20 Well; because of unbelief they were broken off, and thou estandest by faith. eBe not highminded, but ffear: 21 For if God spared not the natural branches, take heed lest he also spare not thee. 22 Behold therefore the goodness and severity of God: on them which fell, severity; but toward thee, goodness, gif thou continue in his goodness: otherwise hthou also shalt be cut off.
See Heb. 3:6.
So John 15:2.