It is narrated from Hazrat Abu Hurairah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: As long as a person waits for prayer, he is considered to be in prayer, and the angels continue to pray for his forgiveness as long as he remains seated at his place of prayer. They keep saying: O Allah, forgive him; O Allah, have mercy on him, as long as he does not lose his ablution. The narrator asked about the meaning of losing ablution, so he (the Prophet) said: Passing wind, whether softly or loudly.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 10881
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد قوي، خ:445،م:649