Jamieson, Fausset and Brown on Zechariah 9:17

17. his goodness ... his beauty--the goodness and beauty which Jehovah-Messiah bestows on His people. Not as Maurer thinks, the goodness, &c., of His land or His people (Psa 31:19; Jr 31:12).

make ... cheerful--literally, "make it grow."

new wine the maids--supply, "shall make ... to grow." Corn and wine abundant indicate peace and plenty. The new wine gladdening the maids is peculiar to this passage. It confutes those who interdict the use of wine as food. The Jews, heretofore straitened in provisions through pressure of the foe, shall now have abundance to cheer, not merely the old, but even the youths and maidens [Calvin].