How true is the information that Abu Talib knew that Muhammad (peace be upon him) would be a prophet on two occasions, and that Khadijah saw in her dream, before her marriage to the Prophet (peace be upon him), that he would be a prophet?

Abu Talib’s journey with the Prophet, peace and blessings be upon him, to Syria, and their meeting with the monk Bahira, indicates that Abu Talib knew of the Prophet’s prophethood when he was a boy, but he did not believe in him and died adhering to the creed of his people. As for Khadijah, may Allah be pleased with her, there is no authentic report that she knew of his prophethood before Allah honored him with it, nor that she saw in a dream that he would be a prophet. What is mentioned about her vision and Waraqa ibn Nawfal’s informing her has no basis in the books of the Hadith (definition) scholars or the Sirah.