Talmud zu Wajikra 24:19

It is said (Lev. 19:3): “Everybody must fear his mother and his father,” and it is said (Deut. 6:13): “You must fear the Eternal, your God, and serve Him.” This brackets the fear of father and mother with the fear of the Omnipresent. [It is said (Ex. 20:12): “Honor your father and your mother,” and it is said (Prov. 3:9): “Honor the Eternal with your property.” This brackets the honor of father and mother with the honor of the Omnipresent.] Is is said (Ex. 21:17): “He who curses his father or his mother shall be put to death,” and it is said (Lev. 24:19): “Everybody who curses his God must bear his sin.” This brackets cursing father and mother with cursing the Omnipresent. It is impossible to speak about hitting relative to the Deity. All this is logical since all three of them are partners in him.