Heidelberg Catechism, Lord’s Day 43
Q112. What is the aim of the ninth commandment?
A112. That I
never give false testimony against anyone,
twist no one’s words,
not gossip or slander,
nor join in condemning anyone
rashly or without a hearing.
Rather, in court and everywhere else,
I should avoid lying and deceit of every kind;
these are the very devices the devil uses,
and they would call down on me God’s intense wrath.
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.