Take of his blood. — The blood was regarded as the life (Genesis 9:4). The life consecrated to God and accepted by Him was given back by Him to His ministers, that it might consecrate them wholly to His service, and so fit them for it. Placed upon the tip of the right ear, it reminded them that their ears were to be ever open and attentive to the whispers of the Divine voice; placed on the thumb of the right hand, it taught that they should take in hand nothing but what was sanctified; placed upon the great toe of the right foot, it was a warning that they were to walk thenceforth in the paths of holiness.
Related Commentaries of Exodus 29:20
Exodus 29:20
20 Then shalt thou kill the ram, and take of his blood, and put it upon the tip of the right ear of Aaron, and upon the tip of the right ear of his sons, and upon the thumb of their right hand, and upon the great toe of their right foot, and sprinkle the blood upon the altar round about.