وَجَعَلنا بَينَهُم وَبَينَ القُرَى الَّتي بارَكنا فيها قُرًى ظاهِرَةً وَقَدَّرنا فيهَا السَّيرَ ۖ سيروا فيها لَيالِيَ وَأَيّامًا آمِنينَ

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 day in safety."