Well God tells us to not bear false witness.
And we read in Proverbs 6:16-19
16 There are six things that the Lord hates,
seven that are an abomination to him:
17 haughty eyes, A LYING TONGUE,
and hands that shed innocent blood,
18 a heart that devises wicked plans,
feet that make haste to run to evil,
19 A FALSE WITNESS WHO BREATHES OUT LIES,
and one who sows discord among brothers.
I heard a story one time from Ravi Zacharias, he said he was in some foreign country where the military was gathering deserters or something, and he and his friends were planning to escape by boat. A bunch of military soldiers came to the place they were staying out by the docks and asked if they were going to desert. He told them no (he lied), and they went away. And then he asked God "Should I tell them the truth?", and he answered "yes.". So the soldiers came back asking if he was deserting, and he said "yes.", and turns out, the soldiers wanted to go with him!