Joel 2:13-14

If they did, they could count on Him being gracious, compassionate, patient, loyal to them, and willing to withhold punishment (cf. Exodus 34:6; Nehemiah 9:17; Psalms 103:8; Psalms 143:8; Jonah 4:2). Their genuine repentance might-Yahweh is still sovereign-move Him to turn from His previously intended course of action and bless, rather than curse, them (cf. Malachi 3:7). Agricultural blessings would signal a reversal of His judgment in the recent locust invasion, and they would then be able to offer grain and wine to the Lord again (cf. Joel 1:9; Joel 1:13).

"Some dismiss biblical references to God ’relenting’ from judgment as anthropomorphic, arguing that an unchangeable God would never change his mind once he has announced his intentions. While it is true that God will not deviate from an announced course of action once he has issued a formal, unconditional decree (see Numbers 23:19; 1 Samuel 15:29; Psalms 110:4), he is often depicted as ’changing his mind’ in contexts where he has given only a warning or made a conditional statement about what he will do. Since Joel 2:13 lists God’s capacity to ’change his mind’ as one of his fundamental attributes (see also Jonah 4:2), one cannot dismiss this characteristic as anthropomorphic." [Note: Chisholm, Handbook of . . ., p. 372. See also idem, "Does God Change His Mind?" Bibliotheca Sacra 152:608 (October-December 1995):387-99; and Thomas L. Constable, Talking to God: What the Bible Teaches about Prayer, pp. 147-48.]