horses. Compare Isaiah 31:1; Isaiah 36:9. Also Ezekiel 17:15.
linen yarn. Probably. by strings, or droves (i.e. the horses).
Related Commentaries of 1 Kings 10:28
1 Kings 10:28
28 And Solomonm had horses brought out of Egypt, and linen yarn: the king's merchants received the linen yarn at a price.