The History of Shāhjahān (ʿInāyat Khān) 5: Firoz Shah's Canal.

5

The canal that Sultan Firoz Shah Khilji, during the time he reigned at Dehli, had made to branch off from the river Jumna, in the vicinity of pargana Khizrabad, whence he brought it in a channel 30 Imperial kos long to the confines of pargana Safidun, which was his hunting-seat, and had only a scanty supply of water, had, after the Sultan's death, become in the course of time ruinous. Whilst Shahabu-d din Ahmad Khan held the government of Dehli, during the reign of the Emperor Akbar, he put it in repair and set it flowing again, with a view to fertilize the places in his Jagir, and hence it was called Nahr-i Shahab; but for want of repairs, however, it again stopped flowing. At the time when the sublime attention was turned to the building of this fort and palace, it was commanded that the aforesaid canal from Khizrabad to Safidun should be repaired, and a new channel excavated from the latter spot to the regal residence, which also is a distance of 30 Imperial kos. After it was thus prolonged, it was designated the Nahr-i Bihisht.