حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ أَيُّوبَ بْنِ أَبِي تَمِيمَةَ السَّخْتِيَانِيِّ، عَنْ مُحَمَّدِ بْنِ سِيرِينَ، أَنَّ عُمَرَ بْنَ الْخَطَّابِ، كَانَ فِي قَوْمٍ وَهُمْ يَقْرَءُونَ الْقُرْآنَ فَذَهَبَ لِحَاجَتِهِ ثُمَّ رَجَعَ وَهُوَ يَقْرَأُ الْقُرْآنَ فَقَالَ لَهُ رَجُلٌ يَا أَمِيرَ الْمُؤْمِنِينَ أَتَقْرَأُ الْقُرْآنَ وَلَسْتَ عَلَى وُضُوءٍ فَقَالَ لَهُ عُمَرُ مَنْ أَفْتَاكَ بِهَذَا أَمُسَيْلِمَةُ

Yahya related to me from Malik from Ayyub ibn Abi Tamima as-Sakhtayani from Muhammad ibn Sirin that Umar ibn al-Khattab was withsome people who were reciting Qur'an. He went to relieve himself andthen came back and recited Qur'an. One of the men said to him, "Amiral muminin, are you reciting the Qur'an without being in wudu?" Umarreplied, "Who gave you a verdict on this? Was it Musaylima?"' Translation Not Available

Book reference: Muwatta Imam Malik Book 15 Hadith 474
Web reference: Muwatta Imam Malik Book 15 Hadith 2