عَنْ أَبِي هُرَيْرَةَ رضي الله عنه عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ:
«لَا يَقْبَلُ اللهُ صَلَاةَ أَحَدِكُمْ إِذَا أَحْدَثَ حَتَّى يَتَوَضَّأَ».
[صحيح] - [متفق عليه] - [صحيح البخاري: 6954]
المزيــد ...
Abu Hurayrah (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said:
"Allah does not accept the prayer of any of you who is in the state of Hadath (minor ritual impurity) until he performs ablution."
[Authentic hadith] - [Narrated by Bukhari & Muslim] - [Sahih Bukhari - 6954]
The Prophet (may Allah's peace and blessings be upon him) clarified that Tahārah (ritual purity) is one of the conditions for the validity of prayer. Hence, whoever wants to pray must make Wudū’ (ablution) if he has already nullified his Wudū’ by defecating, urinating, sleeping, etc.