Musannaf Ibn Abi Shaybah 6925 — Those who delayed their witr

Alqamah said: I prayed with Sayyiduna Abdullah (may Allah be pleased with him) for a whole night. He would raise his voice in the recitation so that all the people present in the mosque could hear. He recited with tartil (measured recitation) and did not repeat the recitation over and over. He prayed witr before the rising of dawn, at a time equal to the time from the adhan of Maghrib until finishing that prayer.