The Book of Miscellany

Riyad as-Salihin, The Book of Miscellany
Book 1, Hadith 10
Narrated 'Abu Hurairah (ra):
The Messenger of Allah (pbuh) said: "The reward for Salat performed by a person in congregation is more than 20 times greater than that of the Salat performed in one's house or shop. When one performs Wudu' perfectly and then proceeds to the mosque with the sole intention of performing Salat, then for every step he takes towards the mosque, he is upgraded one degree in reward and one of his sins is eliminated until he enters the mosque, and when he enters the mosque, he is considered as performing Salat as long as it is the Salat which prevents him (from leaving the mosque); and the angels keep on supplicating Allah for him as long as he remains in his place of prayer. They say: 'O Allah! have mercy on him; O Allah! forgive his sins; O Allah! accept his repentance'. This will carry on as long as he does not pass wind".

[Al-Bukhari and Muslim].

Riyad as-Salihin, The Book of Miscellany
Book 1, Hadith 11
Narrated 'Abdullah bin 'Abbas (ra):
Messenger of Allah (pbuh) said that Allah, the Glorious, said: "Verily, Allah (SWT) has ordered that the good and the bad deeds be written down. Then He explained it clearly how (to write): He who intends to do a good deed but he does not do it, then Allah records it for him as a full good deed, but if he carries out his intention, then Allah the Exalted, writes it down for him as from ten to seven hundred folds, and even more. But if he intends to do an evil act and has not done it, then Allah writes it down with Him as a full good deed, but if he intends it and has done it, Allah writes it down as one bad deed".

[Al-Bukhari and Muslim].