'Ammar bin Yasir (May Allah be pleased with them) reported: He who observes the fast on a doubtful day, has in fact disobeyed Abul-Qasim, (i.e., Messenger of Allah (ﷺ)).[Abu Dawud and At- Tirmidhi].

'Ammar bin Yasir (May Allah be pleased with them) reported: He who observes the fast on a doubtful day, has in fact disobeyed Abul-Qasim, (i.e., Messenger of Allah (ﷺ)).[Abu Dawud and At- Tirmidhi].

وعن أبي اليقظان عمار بن ياسر، رضي الله عنهما قال‏:‏ ‏ "‏من صام اليوم الذي يشك فيه فقد عصي أبا القاسم، صلى الله عليه وسلم‏"‏ ‏(‏‏(‏رواه أبو داود والترمذي وقال‏:‏ حديث حسن صحيح‏)‏‏)‏‏.‏