Silsilat al-Ahadith al-Sahihah

It is narrated from Sayyiduna Taliq bin Ali (may Allah be pleased with him), he says: We came to the Prophet (peace and blessings of Allah be upon him) as a delegation, we pledged allegiance to him, prayed with him, and informed him that in our land there is a church of ours. (Since we want to build a mosque there,) we requested from you the leftover water from your ablution. The Prophet (peace and blessings of Allah be upon him) called for water, performed ablution, rinsed his mouth, and put it in a vessel, then instructed us: "Go, when you reach your area, demolish the church, sprinkle this water there, and build a mosque there." They said: Our area is very far and it is extremely hot, this water will dry up? The Prophet (peace and blessings of Allah be upon him) said: "(On the way) keep adding more water to it, it will only increase its purity." We set out until we reached our area, we demolished the church, sprinkled the water there, and turned it into a mosque, then we gave the call to prayer there. A priest from the tribe of Banu Tai heard the call to prayer and said: This is indeed the call to truth. Then he went towards a hill and after that incident, we did not see him again.