דברי הימים ב יג:ט פירוש: רש״י

like the peoples of the lands Whoever wishes to come and be initiated to be a priest to a golden calf, shall bring a young bull and seven rams, and be accepted.

to initiate himself - Heb. לְמַלֵּא יָדוֹ. To differentiate between impure and pure, similar to (Exod. 29:29): “to be anointed and initiated (וּלְמַלֵּא בָם אֶת יָדָם) through them.”