'Sheepfolds' in the Bible

Issachar [is] a strong donkey, crouching between the sheepfolds.

Why do you sit among the sheepfolds, to hear [the] calling sounds of the herds? For the clans of Reuben, [there were] great searchings of the heart.

Though you [men] lie down between the sheepfolds, [you will be like the] wings of a dove covered in silver and its pinions in yellow gold."

And he chose David his servant and took him from [the] sheepfolds.