Abu 'Amir was hit with an arrow in his knee, so I went to him and he asked me to remove the arrow. When I removed it, the water started dribbling from it. Then I went to the Prophet (ﷺ) and told him about it. He said, "O Allah! Forgive `Ubaid Abu 'Amir."
Sahih al-Bukhari Book 56, Hadith 99
← Previous Hadith We used to take part in holy battles with the Prophet (ﷺ) by providing the people with water and serving them and bringing the killed and the wounded back to Medina.

Sahih al-Bukhari Book 56, Hadith 98 Next Hadith → The Prophet (ﷺ) was vigilant one night and when he reached Medina, he said, "Would that a pious man from my companions guard me tonight!" Suddenly we heard the clatter of arms. He said, "Who is that? " He (The new comer) replied, " I am Sa`d bin Abi Waqqas and have come to guard you." So, the Prophet (ﷺ) slept (that night).

Sahih al-Bukhari Book 56, Hadith 100