Horse and Rider Bound Together So Israel Would Gain the Spoil

"The horse and its rider He has thrown into the sea" (Exodus 15:1). Was there only one horse, that it says "the horse and its rider"? Rather, they were all of no more account before the Holy One, blessed be He, than a single one. Another interpretation of "the horse and its rider": the Holy One, blessed be He, bound them one to another so that Israel would enjoy the plunder. Why? When Israel went out of Egypt and the Egyptians went out to pursue them, Pharaoh said to them, "I know that they have taken your silver and your gold, but pay no attention to the plunder." What did he do? He opened to them the treasuries of Joseph and said to them, "Take for yourselves silver and gold," and they took it and adorned their horses with it, as it is said, "all the horses and chariots of Pharaoh" (Exodus 14:9). Therefore they were bound one to another so that Israel would enjoy the plunder. And in the world to come, all that the nations of the world amass will belong to Israel, as it is said, "And her merchandise and her wages [will be holy to the LORD]" (Isaiah 23:18).