C. A call to repent 1:14

Joel called on the priests not only to mourn (v. 13) but also to assemble all the people at the temple for a solemn fast. Such fasts indicated national repentance in Israel's history (cf. 1 Sam. 7:6; Neh. 9:1-2; Jer. 36:9; Jon. 3:5). Here, as usual, fasting combined with praying to the Lord. The people would pray to Him for mercy and for renewed blessing and would demonstrate their sincerity and urgency by going without food while they prayed.