When Abu Ayub came to us on a military expedition, Uqba bin Amir was at that time the governor over Egypt. Uqba delayed the Maghrib prayer, so Abu Ayub stood up and went to him and said, "What is this prayer, Uqba?"Uqba replied, "We were preoccupied."Abu Ayub said, "Have you not heard the Messenger of Allah ﷺ say, 'My ummah will continue to be in goodness,'" or he said, "'upon the natural way, as long as they do not delay the Maghrib prayer until the stars become densely visible'?"
حدثنا عبيد الله بن عمر حدثنا يزيد بن زريع حدثنا محمد بن إسحق حدثني يزيد بن أبي حبيب
لما قدم علينا أبو أيوب غازيا وعقبة بن عامر يومئذ على مصر فأخر المغرب فقام إليه أبو أيوب فقال له ما هذه الصلاة يا عقبة فقال شغلنا قال أما سمعت رسول الله ﷺ يقول لا تزال أمتي بخير أو قال على الفطرة ما لم يؤخروا المغرب إلى أن تشتبك النجوم
[Its isnad is hasan]Ahmad narrated it, 4/147, from the hadith of Muhammad bin Ishaq bin Yasar, through him. Ibn Khuzayma graded it sahih, hadith 339, as did Hakim, according to the standard of Muslim, 1/190, 191, and Dhahabi agreed with him.