The mention of His birth – From His own tongue
Imam Ahmed bin Hambal, Imam Bazzaar, Imam Tabarani, Imam Hakim, Imam Baihaqui and Imam Abu Nu’aim (May Allah shower His mercy on them) relate:
Translation: It is narrated on the authority of Hadhrat ‘Irbaadh bin Saariya (May Allah be well pleased with him) that the Holy Prophet (Sallallahu alaihi wa sallam) said: I was the bondsman of Allah and the Seal of the Prophets when Adam (May peace be upon him) was yet in the throes of creation. I make it clear to you that I am the supplication of Hadhrat Ibrahim (May peace be upon him), the glad tidings of Hadhrat ‘Isa (May peace be upon him) and the vision of my mother which she saw and similarly the mothers of the Prophets used to have visions and indeed the mother of the Holy Prophet (Sallallahu alaihi wa sallam) saw such a radiance that the mansions of Syria were illuminated. (Khasaais-e-Kubra, Vol. 1, Pg. No. 78)
As per another Hadith, the gathering of the people on the Day of Judgment will be held in Syria. The mansions being illuminated is a sign that the blessings of this Prophet (Sallallahu alaihi wa sallam) will not only be in this world but also in the hereafter. His benevolence is in this world and on the Day of Judgment as well.