Al-Matalib al-'Aliyah 3014 — The greatness of Allah and His attributes

It is narrated from Sayyidah Aishah (may Allah be pleased with her) that a group of Jews came to the Prophet (peace and blessings be upon him) and said: "We wish to ask you about three things that no one knows except a prophet: tell us about the bearers of the Throne (the angels who carry the Divine Throne), who are they? And what is the reality of the fluid of a man and of a woman?" The Messenger of Allah (peace and blessings be upon him) said: "As for the bearers of the Throne, they are mighty creatures who carry it on their horns, and the heat and liquid-like quality that is in the sun comes from their sweat; and the fluid of a man is white and thick, while the fluid of a woman is yellow and thin." He (peace and blessings be upon him) also mentioned the third matter. (Hearing this) the Jews said: "We bear witness that you are indeed the Prophet of Allah, for we find it written likewise in the Torah."
The chain of this hadith contains Baqiyyah bin al-Walid, who is a mudallis (one who conceals defects in the chain), and some parts of the report are questionable from a scholarly and chain-based standpoint, being isolated and munkar (rejected).