People say the Bible is an old-fashioned book, and it is. However, honoring and respecting parents, key principles in the Scripture, should never go out of style. For people who want to use a good resource about respecting parents, it is best to consult the Bible.
This biblical principle is best observed in the earlier books of the Old Testament. Bible characters who value and honor their parents also get favor and blessing from God. On the other hand, those who fail to respect their parents receive punishment from the entire nation!
Meanwhile, in the New Testament, the Lord Jesus Christ mentioned to the Pharisees that they cause the people to sin by neglecting their elderly. He is indirectly stating the importance of honoring and respecting parents, even though He has already fulfilled the Law.