Calvin's Commentaries, Vol. 5: Harmony of the Law, Part III, tr. by John King, [1847-50], at sacred-texts.com
The Exposition of the Commandment
3. Ye shall fear every man his mother and his father.
3. Unusquisque patrem suum et matrem suam timeat.
Since this passage unquestionably relates to the explanation of the Fifth Commandment, it confirms what I have before shown, that the honor which God-commands to be paid to parents, does not consist in reverence only, but also embraces obedience. For the reverence which He now prescribes will render children submissive and compliant. Now, then, we more clearly understand how parents are to be honored, when God exhorts their children to beware of offending them; for this is, in a word, the true manifestation of filial piety, calmly to bear the yoke of subjection, and to prove by acts a sincere desire to obey.