"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." Ex 29:20

Waiting upon the Lord - tip of the right ear
Working for the Lord - thumb of their right hand
Walking with the Lord -  great toe of their right foot

Read Part 1, Part 2, Part 3.