وَنَبِّئْهُمْ أَنَّ الْمَاء قِسْمَةٌ بَيْنَهُمْ كُلُّ شِرْبٍ مُّحْتَضَرٌ
[54:28]
And inform them that the water is shared between them; every share of the water shall be regulated.
And tell them that the water is to be divided between them: Each one's right to drink being brought forward (by suitable turns).
And inform them that the water is to be shared between (her and) them. Every drinking will be witnessed.