Abdul 'Aziz bin Abi Hazim عبد العزيز بن أبي حازم · The Book of Purification

"When any one of you goes to the Gha'it (toilet to defecate), let him take with him three stones and clean himself with them, for that will suffice him."

"When any one of you wakes from sleep to perform Wudu', then let him sniff water in his nose and blow it out three times, for the Shaitan spends the night on his nose."