The companion of the Messenger, Sayyiduna Fadala bin Ubaid (may Allah be pleased with him), says that the Messenger of Allah (peace and blessings be upon him) heard a man supplicating in prayer, while he neither mentioned Allah Almighty nor sent blessings upon you (peace and blessings be upon him), and said: This servant has been hasty. Then you (peace and blessings be upon him) called him and said to him and to others: When any of you prays, he should begin by praising and glorifying Allah Almighty, then send blessings upon the Prophet, then supplicate for whatever he wishes.
Hadith Referenceالفتح الربانی / أبواب صفة الصلاة / 1802