It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When one of you enters the mosque, let him send salutations upon the Prophet (peace and blessings be upon him) and say: 'O Allah, open for me the gates of Your mercy.' And when he goes out, let him send salutations upon the Prophet (peace and blessings be upon him) and say: 'O Allah, protect me from the accursed Satan.'" This hadith is sahih (authentic) on the condition of Imam Bukhari and Imam Muslim, but they did not record it.

Sayyiduna Sa'd bin Abi Waqqas (may Allah be pleased with him) narrates that a man came to the prayer while the Prophet (peace and blessings be upon him) was leading us in prayer. When he reached the row he said: "O Allah, grant me the best of what You grant Your righteous servants." When the Prophet (peace and blessings be upon him) had completed the prayer, he asked: "Who was the one who spoke just now?" The man said: "It was I, O Messenger of Allah." So he (peace and blessings be upon him) said: "Then your horse will be slain and you will be martyred in the path of Allah." This hadith is sahih (authentic) on the condition of Imam Muslim, but the two Shaykhs (Bukhari and Muslim) did not record it.