Whoever ate Garlic, Onion or Leek

Question :

1. There is a Hadith reported from the Messenger of Allah in which he said:
"Whoever ate onion, garlic or leek should not come near to our mosque for three days, because the angels are harmed by that which harms mankind.

or however he said it. Does this mean that it is not permissible for anyone who eats any of these things to pray in the mosque until this period has elapsed, or does it mean that eating it is not permissible for anyone who intends to pray in congregation?

Answer:

1. This Hadith and other authentic Hadiths which carry the same meaning proves that it is disliked for the Muslim to attend the congregational prayer so long as the odor continues to emanate from him, disturbing those around him, whether it be due to eating garlic, onion or leek or other things which have an unpleasant odor, such as smoking, until the smell has gone. As for the limit of three days, there is no basis for it.

Ibn Baz

Question :

2. We preach to the worshippers in Fajr and 'Isha' and we check on those who do not attend the prayer; has this been narrated from the Prophet? I request clarification of this issue, with evidence.

Answer:

2. It is incumbent upon the Muslims to advise one another and to cooperate in righteousness and piety and in enjoining the good and forbidding the evil. And in the implementation of this, it might be necessary for the Muslim to check on his the situation of his brother, but not to spy on him. Rather, he should visit him if he is sick and advise him with that which is beneficial to him or encourage him and help him in attaining what is good for him, or warding off difficulty or harm, and enjoin on him good deeds and forbid him from doing evil and so on. This includes checking on the worshippers, because it has been narrated that the Prophet asked about the worshippers in the Fajr prayer, saying:
Is so-and-so present? Is so-and-so present?

Source:
The Permanent Committee
Fatawa Islamiyah, Vol. 2 Pages 338-339