Musannaf Ibn Abi Shayba 3:2493

Mulaazim ibn ‘Amr narrated to us, from ‘Abdullah ibn Badr, from Qays ibn Talq, from his father, Talq ibn ‘Ali, who said: We went out as a delegation to the Prophet, may Allah bless him and grant him peace, and we informed him that we had a church in our land. We asked him to grant us the remainder of his purification water. He called for water and performed ablution, then he rinsed his mouth, then he placed it for us in a leather container and said: "Take it out with you. When you arrive at your land, break your church, sprinkle its place with the water, and take it as a mosque."