1 Kings 10:27,28

The king made silver to be in Jerusalem as stones An hyperbolical expression, signifying a great plenty of it. Solomon had horses brought out of Egypt, and linen yarn The two chief commodities of Egypt. The king's merchants received the linen yarn at a price Agreed on between Pharaoh and Solomon, who gave this privilege to his merchants for a tribute to be paid out of this commodity. Most think byssus, fine linen, is here meant, one of the principal of the Egyptian merchandises.