التاريخ اليميني 14: Embassy from India to Ghazna.

14

When the ruler (malik) of Hind had witnessed the calamities which had inflicted ruin on his country and his subjects, in consequence of his contests with the Sultan, and had seen their effects far and near, he became satisfied that he could not contend with him. So he sent some of his relatives and chiefs to the Sultan, supplicating him not to invade India again, and offering him money to abstain from that purpose, and their best wishes for his future prosperity. They were told to offer a tribute of fifty elephants, each equal to two ordinary ones in size and strength, laden with the products and rarities of his country. He promised to send this tribute every year, accompanied by two thousand men, for service at the Court of the Sultan.
The Sultan accepted his proposal, as Islam was promoted by the humility of his submission and the payment of tribute. He sent an envoy to see that these conditions were carried into effect. The ruler of Hind strictly fulfilled them and despatched one of his vassals with the elephants to see that they were duly presented to the Sultan. So peace was established, and tribute was paid, and caravans travelled in full security between Khurasan and Hind.