Sunan Abi Dawud 1219
سنن أبي داود#1219SahihThe above mentioned tradition has also been reported by 'Uqail through a different chain of narrators. He said:He would delay the evening prayer till he combined the evening and the night prayers when the twilight disappeared
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Zubair Ali ZaiSahih Bukhari (1112) Sahih Muslim (704)
In-book reference: 4:22