Reference: Fataawa Ramadhaan v1 p200 no.141
Question: If the time for fajr is approaching in Ramadhaan and I need to make ghusl but there is not enough time to perform it nor eat the suhoor, should I perform the ghusl and miss the suhoor or should I eat the suhoor and delay the ghusl until after Fajr?
Response: It is better to eat the suhoor because the Prophet ﷺ said:
, and delay the ghusl because it's time is plenty. So, if Fajr has arrived and you have not made ghusl, then make it and pray and your fast will not be affected. It has been confirmed on the authority of 'Aa.ishah and Umm Salamah رضي الله عنهما that: "if the Messenger of Allaah ﷺ entered the time of Fajr whilst in a state of impurity (Junub) from having had relations with his wife, then he used to make ghusl and fast" [transmitted by al-Bukhaaree no.1925 and Muslim no.1109].
