John Wesley on Acts 2:1

At the pentecost of Sinai, in the Old Testament, and the pentecost of Jerusalem, in the New, where the two grand manifestations of God, the legal and the evangelical; the one from the mountain, and the other from heaven; the terrible, and the merciful one. They were all with one accord in one place - So here was a conjunction of company, minds, and place; the whole hundred and twenty being present.