2 Samuel - Chapter 16

Ziba is waiting to meet King David, and he has ready for him a string of donkeys, saddled and ready to be ridden.  Although David is a King he is not riding on a horse, but on a donkey.

On the day that Jesus enters Jerusalem to show himself as King, he is riding on a donkey:

They brought it to Jesus, threw their cloaks on the colt and put Jesus on it.  As he went along, people spread their cloaks on the road. When he came near the place where the road goes down the Mount of Olives, the whole crowd of disciples began joyfully to praise God in loud voices for all the miracles they had seen: “Blessed is the king who comes in the name of the Lord!” “Peace in heaven and glory in the highest!”