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This Sultan is not slow in waging Holy War (Jihad). In the holy war by land or by sea his bridle or his spear do not deviate (from it). This is the sole object which engages his eye and his ear. He has spent a large amount in exalting the word of Faith and in spreading Islam in these regions, so that the light of Islam was spread in these parts and the lightning of the true guidance flashed in these regions and the fire-temples were destroyed and the Buddha’s statues and idols were broken and the land was freed from those who were not (included) in the land of security, that is, those who had not entered the contract of a Zimmis and through him Islam was spread up to the farthest East, and reached up to where the Sun rises, and he carried the banners of the Islamic people as Abu Nasr-al-Aini says, to where never a banner had reached and no chapter, surat, or verse (ayat) was read of the Quran. Then he built mosques and places of worship and replaced music by prayer-call and silenced the mumblings of the Magians by the recitation of the Quran, and he directed the people of this faith (Islam) against the fortresses of the infidels. And he has appointed them with the help of God as the heirs of their property and their lands and the country which they had never trodden under foot: land after land was placed under the banner of this Sultan. On land his banners are like eagles and on sea the banners are like the crows of the running ships, so that no day passes without the sale of thousands of slaves for the lowest prices on account of the great number of captives and prisoners.
— MUHAMMAD BIN TUGHLUQ