Sayyiduna Uthman bin Abi al-As (may Allah be pleased with him) said that his mother told him; she said: "I was present with Aminah when she gave birth to the Messenger of Allah (peace and blessings be upon him). When her labour pains began, I saw the stars drawing so close that I began to say: They will fall upon me. Then, when she gave birth, a light came out of her by which the house and the courtyard in which we were became illuminated, and I could see nothing but light."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21817