Joel 2:14

Who knoweth if he will lit. Who knoweth? he will…, i.e. Peradventure he will…, or (R.V.) Who knoweth whether he will not …? The same idiom in 2 Samuel 12:22, and (in the same phrase as here) Jonah 3:9.

turn back] viz. from the path of judgment upon which he has entered.

and leave a blessing behind him as he turns back.

a blessing viz. by permitting the earth again to mature its fruits and yield materials for the meal -and drink-offerings in the sanctuary (Joel 1:9). The fruits of the earth are a blessingbestowed by God upon man (Deuteronomy 7:13; Deuteronomy 16:10; Deuteronomy 16:15; Deuteronomy 16:17, &c.); and they are a double blessing, when, as here, being such as can be offered to Jehovah, they help to ensure His good-will.