When do we have to stop eating and drinking when fasting

A number of our people have narrated from Ahmad ibn Muhammad from Ali ibn al-Hakam from ‘Asem ibn Humayd from abu Basir who has said the following: “I once asked abu ‘Abd Allah, ‘Alayhi al-Salam, ‘When does it become unlawful to eat and drink for one fasting, and when does performing Salat (prayer) of the morning becomes lawful?’ He (the Imam) said, ‘When dawn appears which looks like white Coptic fabrics, then eating and drinking become unlawful for a fasting person and performing the morning Salat (prayer) becomes lawful.’ I then said, ‘So we do not have time until sunrise.’ He (the Imam) said, ‘That is not it at all. Where are you going? That is the time for Salat (prayer) by children.’”

Sheikh Al Majlisi:Sahih

📚Miratul Uqool V16,P267