Ubaidullah bin Abi Bakr عبيد الله بن أبي بكر بن أنس · Fasting (Kitab Al-Siyam)

The Prophet (ﷺ) commanded to apply collyrium mixed with musk at the time of sleep. He said: A man who is fasting should abstain from it. Abu Dawud said: Yahya b. Ma'in said to me: This tradition about the use of collyrium is munkar (i.e. contradicts the sound traditions on the subject).