"The Messenger of Allah (ﷺ) said: 'If a man feels drowsy when he is praying, let him stop, lest he supplicate against himself without realizing.'"
Sunan an-Nasa'i Book 1, Hadith 163
← Previous Hadith "When any one of you wakes from sleep, let him not put his hand into the vessel until he has washed it three times, because he does not know where his hand spent the night."

Sunan an-Nasa'i Book 1, Hadith 162 Next Hadith → "I entered upon Mawan bin Al-Hakam and we mentioned the things for which Wudu' is done. Marwan said: 'Wudu' should be done after touching the penis.' 'Urwah said: 'I did not know that.' Marwan said: 'Busrah bint Safwan told me that she heard the Messenger of Allah (ﷺ) say: "And if any one of you touches his penis, let him do Wudu'."

Sunan an-Nasa'i Book 1, Hadith 164