the Messenger of Allah ﷺ ruled concerning the irrigation of palm trees from streams, that the higher ground should be irrigated before the lower, and that the water should be allowed to reach the ankles, then released to flow the nearest lower ground, and so on, until all the fields were watered or until the water ran out.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَضَى فِي شُرْبِ النَّخْلِ مِنَ السَّيْلِ أَنَّ الأَعْلَى فَالأَعْلَى يَشْرَبُ قَبْلَ الأَسْفَلِ وَيُتْرَكُ الْمَاءُ إِلَى الْكَعْبَيْنِ ثُمَّ يُرْسَلُ الْمَاءُ إِلَى الأَسْفَلِ الَّذِي يَلِيهِ وَكَذَلِكَ حَتَّى تَنْقَضِيَ الْحَوَائِطُ أَوْ يَفْنَى الْمَاءُ  

the Messenger of Allah ﷺ ruled concerning the irrigation of palm trees from streams, that the higher ground should be irrigated before the lower, and that the water should be allowed to reach the ankles, then released to flow the nearest lower ground, and so on, until all the fields were watered or until the water ran out. (Using translation from Ibn Mājah 2483)   

إِنَّ مِنْ قَضَاءِ رَسُولِ اللهِ ﷺ أَنَّهُ قَضَى فِي مَشْرَبِ النَّخْلِ مِنَ السَّيْلِ أَنَّ الْأَعْلَى فَالْأَعْلَى يَشْرَبُ قَبْلَ الْأَسْفَلِ وَيُتْرَكُ فِيهِ الْمَاءُ إِلَى الْكَعْبَيْنِ ثُمَّ يُرْسَلُ الْمَاءُ إِلَى الْأَسْفَلِ الَّذِي يَلِيهِ وَكَذَلِكَ حَتَّى يَنْقَضِيَ الْحَوَائِطُ إِسْحَاقُ بْنُ يَحْيَى بْنِ عُبَادَةَ مُرْسَلٌ