The Messenger of Allah ﷺ used to delay the night prayer.
أخبرنا قتيبة قال حدثنا أبو الأحوص عن سماك
كان رسول الله ﷺ يؤخر العشاء الآخرة
No references are available.
Muslim included it in Sahih Muslim, Book of Mosques, Chapter on the time for Isha and delaying it, no. 643, from Qutayba, through this same chain.