The Islamic ruling is that leaving the mosque after the Adhan and before offering the prayer is disliked if there is no valid excuse. However, if a person has a valid excuse, then it is allowed and not disliked.

This ruling is based on a hadith where Abu Hurairah رضي الله عنه saw a man leave the mosque after the Adhan and said that the person had disobeyed the Prophet Muhammad صلى الله عليه وسلم. This hadith is recorded in Sahih Muslim.

Imam Nawawi, a well-known Islamic scholar, also stated that it is disliked to leave the mosque after the Adhan until one prays, unless there is an excuse. This confirms the fatwa given by Islamic scholars on this issue.