Hameed bin Abi Hameed حميد بن أبي حميد الطويل · The Book on Purification

"The Prophet would perform wudu for every Salat, whether he was in state of purity or not in a state of purity."

"Some people from Urainah arrived in Al-Madinah, and they were uncomfortable (and ill from the climate). So Allah's Messenger sent them some camels from charity. He told them: "Drink from their milk and urine." So they killed the camel driver that Allah's Messenger sent, and they violently drove off the camels, and apostatized from Islam. So the Prophet came to them, he cut off their hands and feet on opposite side, and branded their eyes, and threw them in Al-Harrah."…

the Prophet met him while he was Junub. He said: " I withdrew - to perform Ghusl. Then he returned, so he said: 'Where have you been?' Or: 'Where did you go?' I replied: 'I was Junub.' So he said: 'Indeed the believer is not defiled.'''