What is the evidence of the Malikis in their saying that fasting is invalidated by the emission of prostatic fluid (madhy)?

The Maliki school of thought holds that the emission of prostatic fluid (madhy) by a fasting person while awake, with accustomed pleasure, even if due to looking, invalidates the fast. However, its emission without pleasure, or with unaccustomed pleasure, does not invalidate it. The Hanbalis agreed with them that the emission of madhy breaks the fast if it results from direct contact, such as a touch. As for its emission without direct contact, it does not invalidate the fast. They cited the tradition that the Prophet, peace and blessings be upon him, would kiss while fasting, but he was the most self-controlled of people regarding his desire. Aisha, may Allah be pleased with her, pointed out that whoever does not control his desire should not kiss, lest madhy be emitted from him. They also cited what Abu Dawud narrated, that the Prophet, peace and blessings be upon him, permitted direct contact for the old man but forbade it for the young man. Among the evidences for breaking the fast due to the emission of madhy is that its emission involves a kind of gratification of desire and pleasure, and the fasting person is required to avoid that, based on the Prophet's saying, peace and blessings be upon him, about his Lord, the Blessed and Exalted, concerning the fasting person: "He leaves his food, drink, and desires for My sake."