Sahabah dying thirsty for others:

Hadhrat Abu-Jahm-bin-Huzaifah (Radhiyallaho anho) narrates:

"During the battle of Yarmuk, I went out in search of my cousin, who was in the forefront of the fight. I also took some water with me for him. I found him in the very thick of battle in the last throes of death. I advanced to help him with the little water I had. But, soon, another sorely wounded soldier beside him gave a groan, and my cousin averted his face, and beckoned me to take the water to that person first. I went to this other person with the water. He turned out to be Hishaam bin Abil Aas (Radhivallaho anho). But 1 had hardly reached him, when there was heard the groan of yet another person lying not very far off. Hishaam (Radhiyallatio anho) too motioned me in his direction. Alas, before I could approach him, he had breathed his last. I made all haste hack to Hishaam and (mind him dead as well. Thereupon, I hurried as fast as I could to my cousin, and, lo! in the meantime he had also joined the other two.

Many an incident of such self-denial and heroic sacrifice is recorded in the books of Hadith. This is the last word in self-sacrifice, that each dying person should forego slaking his own thirst in favor of his other needy brother. May Allah bless their souls with His choicest favors for their sacrifice favors even at the time of death, when a person has seldom the sense to make a choice.