Kehillah in Rome 11:21-23
Orthodox Jewish Bible
21 For if G-d did not spare the natural anafim, neither will He spare you.
22 Consider then the nedivut (generosity), the chesed of Hashem, and also the fearful judgment of Hashem: to those who fell (11:15), severity; but to you the goodness of Hashem, provided that you continue in that goodness; otherwise, you too will be cut off.
23 Whereas, they also, if they do not continue in a condition of no emunah, shall be grafted in; for Hashem is able to graft them in again.Read full chapter