Romans 11:29-31 (AMP)
29 For God’s gifts and His call are irrevocable. [He never withdraws them when once they are given, and He does not change His mind about those to whom He gives His grace or to whom He sends His call.]
30 Just as you were once disobedient and rebellious toward God but now have obtained [His] mercy, through their disobedience,
31 So they also now are being disobedient [when you are receiving mercy], that they in turn may one day, through the mercy you are enjoying, also receive mercy [that they may share the mercy which has been shown to you—through you as messengers of the Gospel to them].