The Virtue of giving water in charity

It was narrated that Sad bin Ubadah said:
"I said: 'O Messenger of Allah, what charity is best?' He said: 'Giving water to drink.'"

حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا وَكِيعٌ، عَنْ هِشَامٍ، صَاحِبِ الدَّسْتَوَائِيِّ عَنْ قَتَادَةَ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، عَنْ سَعْدِ بْنِ عُبَادَةَ، قَالَ قُلْتُ يَا رَسُولَ اللَّهِ أَىُّ الصَّدَقَةِ أَفْضَلُ قَالَ " سَقْىُ الْمَاءِ " .

It was narrated from Anas bin Malik that the Messenger of Allahﷺ said:
"On the Day of Resurrection, people will be lined up in rows, (one of the narrators) Ibn NUmair said: i.e., the people of Paradise, and a man from among the people of Hell will pass by a man (from the people of Paradise) and say: 'O so and so! Do you not remember the day when you asked for water and I gave you water to drink?" So he will intercede for him. And another man will come and say: " Do you not remember the day when I gave you water with which to purify yourself?" and he will intercede for him." (In his narration, one of the narrators) Ibn NUmair said: "And he will remember the day when you sent me to do such and such for you, and I went and did it for you?' and he will intercede for him." "

حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ نُمَيْرٍ، وَعَلِيُّ بْنُ مُحَمَّدٍ، قَالاَ حَدَّثَنَا وَكِيعٌ، عَنِ الأَعْمَشِ، عَنْ يَزِيدَ الرَّقَاشِيِّ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ قَالَ رَسُولُ اللَّهِ ﷺ " يَصُفُّ النَّاسُ يَوْمَ الْقِيَامَةِ صُفُوفًا - وَقَالَ ابْنُ نُمَيْرٍ أَهْلُ الْجَنَّةِ - فَيَمُرُّ الرَّجُلُ مِنْ أَهْلِ النَّارِ عَلَى الرَّجُلِ فَيَقُولُ يَا فُلاَنُ أَمَا تَذْكُرُ يَوْمَ اسْتَسْقَيْتَ فَسَقَيْتُكَ شَرْبَةً قَالَ فَيَشْفَعُ لَهُ وَيَمُرُّ الرَّجُلُ فَيَقُولُ أَمَا تَذْكُرُ يَوْمَ نَاوَلْتُكَ طَهُورًا فَيَشْفَعُ لَهُ " . قَالَ ابْنُ نُمَيْرٍ " وَيَقُولُ يَا فُلاَنُ أَمَا تَذْكُرُ يَوْمَ بَعَثْتَنِي فِي حَاجَةِ كَذَا وَكَذَا فَذَهَبْتُ لَكَ فَيَشْفَعُ لَهُ " .