Saba 34:18

WajaAAalna baynahum wabayna alquraallatee barakna feeha quran thahiratanwaqaddarna feeha assayra seeroo feehalayaliya waayyaman amineen

And We placed between them and the cities which We had blessed [many] visible cities. And We determined between them the [distances of] journey, [saying], "Travel between them by night or by day in safety."

And We had set visible townships, all the way between them and the towns blessed by Us, and phased the journey between them in measured phases: “Travel along them at nights and days peacefully.”