Sayyidina Sulayman ibn Buraida (RA) reported from his father that the Prophet (SAW) used to perform ablution for every salah. When Makkah was liberated, he offered several salah with one ablution and wiped over his socks. Sayyidina Umer (RA) said, “You did something that you never used to do before”. He said. “I did it on purpose”