The Lord provides very clear instructions regarding the blood of this sacrifice. First, the priest would collect some blood in a vessel. Then, after entering the holy place of the sanctuary, he would dip his finger in the blood and splatter it on the curtain seven times.
6 il trempera son doigt dans le sang, et il en fera sept fois l'aspersion devant l'Eternel, en face du voile du sanctuaire.