John Gill Commentary 1 Kings 10:25

"And they brought every man his tribute, vessels of silver, and vessels of gold, and raiment, and armor, and spices, horses, and mules, a rate year by year." — 1 Kings 10:25 (ASV)

And they brought every man his present
To recommend them, and introduce them into his presence:

vessels of silver, and vessels of gold, and garments, and armour, and
spices, and horses, and mules, a rate year by year ;
everyone brought according to the commodities of his country; and they did yearly, out of great respect to him, and in veneration of him for his wisdom, and for the advantages they received by his wise counsels and instructions; besides, it was the custom of the eastern countries not to pay a visit, especially to great personages, without carrying a present.