פירוש על דברי הימים א 15:2

except the Levites, for the Lord chose them i.e., God chose the Levites [to carry the Ark], and not a cart, for because we placed it in a cart, Uzza was punished, and that is what is stated further: “For from the beginning, [when] you were not [the bearers], the Lord our God made a breach in us, for we had not sought Him properly,” for we placed it in a cart.