It is narrated from Sayyiduna Sa’ib bin Yazid (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: My Ummah will always remain upon the natural disposition (fitrah) as long as it continues to perform the Maghrib prayer before the appearance of the stars.
Hadith Referenceالفتح الربانی / كتاب الصلاة / 1153