Sunan Abi Dawud Fasting (Kitab Al-Siyam) Anas ibn Malik Muhammad bin Khazim al-Darir محمد بن خازم أبو معاوية الضرير Ubaidullah bin Abi Bakr عبيد الله بن أبي بكر بن أنس Wahb bin Bqyh bin 'Uthman وهب بن بقية بن عثمان Da'if 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). https://parallelquran.com/hadith/sunan-abi-dawud-2377/ Sunan Abi Dawud General Behavior (Kitab Al-Adab) Anas ibn Malik Hammad bin Zayd حماد بن زيد بن درهم الأزدي الأزرق Muhammad bin 'Ubaid al-Tanafasi محمد بن عبيد بن أبي أمية الطنافسي Ubaidullah bin Abi Bakr عبيد الله بن أبي بكر بن أنس Sahih when a slave acts sincerely towards his master and worship Allah well, he will have a double reward. https://parallelquran.com/hadith/sunan-abi-dawud-5169/