Musannaf Ibn Abi Shayba 3:2660

Abu Bakr narrated to us, he said: Muhammad bin Bakr narrated to us, from Uqbah bin Abi Jasrah, he said: I asked Ishaq bin Abdullah bin al-Harith about performing ghusl on the day of Jumu'ah. He said: Abdullah bin al-Harith used to perform ghusl on the day of Jumu'ah while traveling and while at home.