This prayer is taken from Sayyidi Habib Umar bin Hafiz’s collection of prayers using Allah’s beautiful names in which he calls upon Allah by His beautiful names and then asks Him to bestow prayers upon His Beloved by those names. Finally, he asks Allah for a portion of those attributes which belong to Allah and which He has bestowed upon His Messenger ﷺ.
اللَّهُمَّ يا اللهُ يا فَتَّاحُ صَلِّ على عَبْدِكَ و حَبِيبِكَ سَيِّدِنا مُحَمَّدٍ النَّبِيِّ جَامِعِ الفَتْحِ و على آلِهِ و صَحْبِهِ و سَلِّمْ تَسْلِيماً و افْتَحْ لِي بِهِ فَتْحاً مُبِيناً
Allāhumma yā Allāhu yā Fattāḥu ṣalli ‘alā ‘abdika wa ḥabībika sayyidinā Muḥammad an-nabī jāmi’i’l-fatḥi wa ‘alā ālihi wa ṣaḥbihi wa sallim taslīman w’aftaḥ lī bihi fatḥan mubīnā
O Allah, O Opener, bestow abundant prayers and peace upon Your slave and beloved, our Master Muhammad, the Prophet, the one who attained all openings and upon his Family and Companions, and by him bless me with a clear opening.