This highlights the fact that there is only one true altar for proper worship. No private altars are permitted, not even for peace offerings which were presented in the family context. All offerings must be made in the proper way and only at the altar of the Lord.
6 Le sacrificateur en répandra le sang sur l'autel de l'Eternel, à l'entrée de la tente d'assignation; et il brûlera la graisse qui sera d'une agréable odeur à l'Eternel.