Musannaf Ibn Abi Shaybah

Hazrat Nafi' says that on rainy nights, our leaders would delay the Maghrib prayer and offer the Isha prayer early, before the disappearance of the twilight. Hazrat Ibn Umar (may Allah be pleased with them both) would also pray with them in this manner and did not consider there to be any harm in it. Hazrat Ubaidullah says that I also saw Hazrat Qasim and Hazrat Salim praying with them in the same way.