الْحَمْدُ لِلَّهِ وَحْدَهُ، وَالصَّلاَةُ وَالسَّلاَمُ عَلَى مَنْ لاَ نَبِيَّ بَعْدَهُ
Transliteration
Alḥamdulillahi waḥdah waṣ-ṣalatu was-salam `alā man lā nabiyya ba`dah.
Translation
All praise is due to Allah alone, and peace and blessings be upon him after whom there is no other Prophet.
Virtue (Fadl)
The recommendation to begin supplication with praise to Allah the Exalted and extolling Him, followed by prayers upon the Messenger of Allah ﷺ.
Source
Anas (RA) said that he heard the Prophet (ﷺ) say: "That I sit with people remembering Almighty Allah from the morning (Fajr) prayer until sunrise is more beloved to me than freeing four slaves from among the Children of Isma'il." - Abu Dawud (No. 3667). Al-Albani graded it good in Sahih Abu Dawud 2/698.