‘A'isha told of God’s messenger passing water and ‘Umar standing behind him with a jug of water. He said, “What is this, ‘Umar?” He replied, “Water for you to perform ablution with.” He said, “I have not been commanded to perform ablution every time I pass water. If I were to do so it would become a sunna”
Abu Huraira reported God’s messenger as saying that Gabriel came to him and said, “When you perform ablution, Muhammad, sprinkle yourself.”
Tirmidhi transmitted it and said, “This is a gharib tradition, and I heard Muhammad (i.e. Bukhari) say that the traditions of al-Hasan b. ‘Ali al-Hashimi the transmitter are rejected.”
Abu Ayyub, Jabir and Anas said that when this verse came down, “In it are men who love to be purified, and God loves those who purify themselves,”* God’s messenger said, “God has praised you Ansar for purification. What does your purification consist of?” They replied,
“We perform ablution for prayer, wash after seminal emission, and cleanse ourselves with water.” He said, “That is it, so keep on doing it.”
*1. Qur'an, ix, 108.
Zaid b. Haritha reported on the Prophet’s authority that when he first received inspiration Gabriel came to him and taught him the ablution and the prayer. When he finished the ablution he took a handful of water and sprinkled his private parts with it.