Romans 11:21

For if God spared not the natural branches, take heed lest he also spare not thee.
— Romans 11:21, King James Version

In other translations

World English Bible (WEB)

for if God didn't spare the natural branches, neither will he spare you.

American Standard Version (ASV)

for if God spared not the natural branches, neither will he spare thee.

Young's Literal Translation (YLT)

for if God the natural branches did not spare--lest perhaps He also shall not spare thee.