Taking God's Name In Vain

Question 1

Ye have said, It is vain to serve God: and what profit is it that we have kept his ordinance, and that we have walked mournfully before the LORD of hosts?

Answer 1

Malachi 3:14

Question 2

Remove far from me vanity and lies: give me neither poverty nor riches; feed me with food convenient for me:
Lest I be full, and deny thee, and say, Who is the LORD? or lest I be poor, and steal, and take the name of my God in vain.

Answer 2

Proverbs 30:8-9

Question 3

But in vain they do worship me, teaching for doctrines the commandments of men.

Answer 3

Matthew 15:9