"The one ﷺ had it not been for him, this world would not have come out of non-existence."

Imam al-Busiri (rahimahullah) in his celebrated poem known as Qasida al-Burda, "The Poem of The Mantle." The actual title of the poem is al-Kawākib al-durriyya fī madḥi Khayr al-Bariyya ("The Celestial Lights in Praise of the Best of Creation") ﷺ.

sh. Hamza Yusuf (hafizahullah) explains this line and several others according to the Sunni scholarly tradition.

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Allahumma ṣalli ʿalā Sayyidinā Muḥammadini l-Fātiḥi limā ughliq(a), wa l-khātimi limā sabaq(a), nāṣiri l-ḥaqqi bi l-ḥaqq(i), wa l-hādī ilā ṣirāṭika l-mustaqīm(i), wa ʿalā ālihi ḥaqqa qadrihi wa miqdārihi l-ʿaẓīm.

O Allah, send prayers upon our master Muhammad, the Opener of what was closed, and the Seal of what had preceded, the Helper of the truth by the Truth, and the Guide to Your straight path. May Allah send prayers upon his Family according to his greatness and magnificent rank.