Maliks Muwatta Book 009, Hadith Number 002.

Section : Joining Two Prayers when Settled and when Travelling.

Yahya related to me from Malik from Abu'z-Zubayr al-Makki from Abu't-Tufayl Amir ibn Wathila that Muadh ibn Jabal told him that they went out with the Messenger of Allah, may Allah bless him and grant him peace, in the year of Tabuk, and the Messenger of Allah, may Allah bless him and grant him peace, joined dhuhr with asr and maghrib with isha. Muadh said, "One day he delayed the prayer, and then came out and prayed dhuhr and asr together. Then he said, 'Tomorrow you will come, insha'llah, to the spring of Tabuk. But you will not get there until well into the morning. No one who arrives should touch any of its water until I come.' We came to it and two men had got to it before us and the spring was dripping with a little water. The Messenger of Allah, may Allah bless him and grant him peace, asked them, 'Have you touched any of its water?' They said, 'Yes.' The Messenger of Allah, may Allah bless him and grant him peace, reviled them and said what Allah wished him to say. Then they took water with their hands from the spring little by little until it had been collected in something. Then the Messenger of Allah, may Allah bless him and grant him peace, washed his face and hands in it. Then he put it back into the spring and the spring flowed with an abundance of water and the people drew water from it. The Messenger of Allah, may Allah bless him and grant him peace, said, 'If you live long enough, Muadh, you will soon see this place filled with gardens.'"