Jamieson, Fausset and Brown on Song of Solomon 2:15

15. Transition to the vineyard, often formed in "stairs" (So 2:14), or terraces, in which, amidst the vine leaves, foxes hid.

foxes--generic term, including jackals. They eat only grapes, not the vine flowers; but they need to be driven out in time before the grape is ripe. She had failed in watchfulness before (So 1:6); now when converted, she is the more jealous of subtle sins (Psa 139:23). In spiritual winter certain evils are frozen up, as well as good; in the spring of revivals these start up unperceived, crafty, false teachers, spiritual pride, uncharitableness, &c. (Psa 19:12; Mt 13:26; Lu 8:14; 2Ti 2:17; He 12:15). "Little" sins are parents of the greatest (Ec 10:1; 1Co 5:6). Historically, John the Baptist spared not the fox-like Herod (Lu 13:32), who gave vine-like promise of fruit at first (Mr 6:20), at the cost of his life; nor the viper-Sadducees, &c.; nor the varied subtle forms of sin (Lu 3:7-14).