Musannaf Ibn Abi Shaybah 5478 — Those who prayed two rakahs after

Abu Abd al-Rahman said: Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) came to us, and he used to order us to pray four rak'ahs after the Jumu'ah. When Sayyiduna Ali (may Allah be pleased with him) came to us, he would order us to pray six rak'ahs after the Jumu'ah. So we took the view of Sayyiduna Ali (may Allah be pleased with him) and left the view of Sayyiduna Abdullah. He would pray two rak'ahs first, then four.