A. Yusuf Ali:Translation:
And tell them that the water is to be divided between
them: 5150 Each one´s right to drink being brought
forward (by suitable turns).

Muhammad Asad:Translation:
And let them know that the water [of their wells] is to be divided between them, 16 with each share of water equitably apportioned.”
5150 See 26:155-156. All were to have water in due turn. It was to be no one's monopoly. And certainly the gates were not to be shut against the poor or their cattle.