Q 112. What is God’s will for you
in the ninth commandment?

A. God’s will is that I
never give false testimony against anyone,
twist no one’s words,
not gossip or slander,
nor join in condemning anyone
without a hearing or without a just cause.^1

Rather, in court and everywhere else,
I should avoid lying and deceit of every kind;
these are devices the devil himself uses,
and they would call down on me God’s intense anger.^2
I should love the truth,
speak it candidly,
and openly acknowledge it.^3
And I should do what I can
to guard and advance my neighbor’s good name.^4

^1 Ps. 15; Prov. 19:5; Matt. 7:1; Luke 6:37; Rom. 1:28-32
^2 Lev. 19:11-12; Prov. 12:22; 13:5; John 8:44; Rev. 21:8
^3 1 Cor. 13:6; Eph. 4:25
^4 1 Pet. 3:8-9; 4:8

http://www.crcna.org/pages/heidelberg_commandments.cfm#Day 43

Q. 112. What is God’s will for you
in the ninth commandment?

A. God’s will is that I
never give false testimony against anyone,
twist no one’s words,
not gossip or slander,
nor join in condemning anyone
without a hearing or without a just cause.

Rather, in court and everywhere else,
I should avoid lying and deceit of every kind;
these are devices the devil himself uses,
and they would call down on me God’s intense anger.
I should love the truth,
speak it candidly,
and openly acknowledge it.
And I should do what I can
to guard and advance my neighbor’s good name.

http://www.crcna.org/pages/heidelberg_commandments.cfm#Day 43

Q. 112. What is required in the ninth commandment?

A. That I bear false witness against no man, nor falsify any man’s words; that I be no backbiter, nor slanderer; that I do not judge, nor join in condemning any man rashly, or unheard; but that I avoid
all sorts of lies and deceit, as the proper works of the devil, unless I would bring down upon me the heavy wrath of God; likewise, that in judgment and all other dealings I love the truth, speak it uprightly and confess it; also that I defend and promote, as much as I am able,
the horror and good character of my neighbour.

http://www.ccel.org/creeds/heidelberg-cat-ext.txt