It takes time to settle the horses and cool them down after their long gallop, before you can give them water and feed. The horses are healthy and apparently well-kept while in custody of the hobgoblins; likely the militant goblinoids recognize the value of these mounts.
While you wait, you gather what you desire from the bodies of the goblinoids. By now, the sun has reached its apex as you feel ready to resume travel.
OOC:
Consider this time spent as a short rest. You may use any number of Hit Dice to recover hit points, or recover any applicable abilities.
It is up to you how you divvy up the spoils of battle, or who will track what they've found. For those who wish to claim one of the three horses, here are their stats:
Riding Horse
Large beast, unaligned
AC: 10; HP 22; Speed 60 ft.
STR 16 (+3); DEX 10 (+0); CON 12 (+1); INT 2 (-4); WIS 11 (+0); CHA 7 (-2)
Senses: Passive Perception 10
Hooves. Melee Weapon Attack: +2 to hit, reach 5 ft., one target. Hit: 2d4+3 bludgeoning damage.