Translation:

73. We have made it a memorial (of our handiwork) and an article of comfort and convenience for the denizens of deserts.

Notes (Tafseer)

5255. That is, the ordinary fire in this world is a reminder of the Great Fire of the next world to all those who heed and reflect.

5256. A fire in a desert is a sign of human habitation; by following it you may get human society and human comfort. A fire, or light, or beacon in many places directs a traveller or the way. Lighthouses at sea and becons in modem aerodromes serve the same purpose for mariners and airmen. Another parable about fire will be found in ii. 17-18, and n. 38.