It is narrated from Abdur Rahman bin Yazid Ansari that when Sayyiduna Anas bin Malik (may Allah be pleased with him) came from Iraq, Abu Talha and Ubayy bin Ka'b went to meet him. Sayyiduna Anas (may Allah be pleased with him) presented to them food that had been cooked with fire, and then all of them ate. Then Sayyiduna Anas (may Allah be pleased with him) got up and performed ablution. So Abu Talha and Ubayy bin Ka'b said, "Did you learn to perform ablution after eating food in Iraq?" Sayyiduna Anas (may Allah be pleased with him) replied, "I wish I had not performed ablution." Then Abu Talha and Ubayy bin Ka'b stood up and both of them prayed without performing ablution.