Abd al-Malik bin Umayr narrates: I heard Sayyiduna Shabib Abu Rawh (may Allah be pleased with him), who was from Dhu al-Kala', relate that he was praying behind the Prophet (peace and blessings be upon him). The Prophet (peace and blessings be upon him) recited Surah al-Rum and hesitated in a verse. When he finished the prayer, he said: We become confused in the Qur'an because some people among you pray with us who do not perform ablution well. Whoever attends the prayer with us should perform ablution well.
Ahmad recorded it, and its narrators are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الطهارة / 1241