'Summer' in the Bible

When David was a little past the summit [of the Mount of Olives], behold, Ziba, the servant of Mephibosheth, met him with a team of saddled donkeys, and on them were two hundred loaves of bread, a hundred clusters of raisins, a hundred summer fruits, and a jug of wine.

The king said to Ziba, “Why do you have these?” Ziba said, “The donkeys are for the king’s household (family) to ride on, the bread and summer fruit for the young men to eat, and the wine is for anyone to drink who becomes weary in the wilderness.”