Walking to the mosque and remaining in it
In the Sahih of Muslim we find:
"The angels pray on the one who comes to the mosque saying, 'O Allah, bless him! O Allah, show mercy to him! as long as he does no harm and does not break wudu'.""
Abu Hurayra, may Allah be pleased with him, said that the Messenger of Allah, may Allah bless him and grant him peace, said:
"The group prayer is twenty-five degrees higher than the prayer in your house or the prayer in your place of business. Anyone who does wudu' and goes to the mosque with no other object than to do the prayer, Allah will raise him up a degree with every step he takes, and a wrong
action will fall away from him. When he prays, the angels pray for him all the time he is in his place of prayer say- ing, O Allah! Forgive him! O Allah! Show mercy to him! One of you is in the prayer as long as he is waiting for the prayer." In one variant, ""O Allah, forgive him! O Allah, turn to him as long as he does no harm in it and does not break wuda' in it."
Al-Bukhari, Muslim. Abu Dawud, at-Tirmidhi and Malik related it.
The meaning of "as long as he does no harm in it" is as long as he does not harm any of those praying by word or deed.
The meaning of "as long as he does break wudu" is as long as no wind issues from him. This is why it recommended for a Mus- lim to do wudu' whenever he breaks it so that he obtains the prayer of the angels on himself.
Ibn Hajar said that this hadith demonstrates the virtues of the prayer over other actions by mentioning the prayer of the angels on him and their praying for mercy, forgiveness and tawba for him. It also demonstrates the excellence of the righteous people over the angels because they obtain degrees through their worship while the angels are occupied with asking forgiveness and suppli- cation for them."