Exodus 20:7לַשָּׁוְא
You shall not take the name of the LORD your God in vain, for the LORD will not leave anyone unpunished who takes His name in vain.
Job 7:3שָׁוְא
So I am allotted months of futility, and nights of misery are appointed to me.
Psalm 12:2שָׁוְא
They lie to one another; they speak with flattering lips and a double heart.
Isaiah 1:13שָׁוְא
Bring your worthless offerings no more; your incense is detestable to Me. New Moons, Sabbaths, and convocations—I cannot endure iniquity in a solemn assembly.
Jeremiah 18:15לַשָּׁוְא
Yet My people have forgotten Me. They burn incense to worthless idols that make them stumble in their ways, leaving the ancient roads to walk on rutted bypaths instead of on the highway.
Ezekiel 12:24שָׁוְא
For there will be no more false visions or flattering divinations within the house of Israel,

Brown-Driver-Briggs

שָׁוְא n.[m.] emptiness, vanity

Sources: Brown-Driver-Briggs (1906, public domain) from the Open Scriptures Hebrew Lexicon (CC BY 4.0), glosses from STEPBible TBESH (CC BY 4.0); STEPBible TAHOT (Hebrew Bible, Leningrad Codex, CC BY 4.0); the Berean Standard Bible (public domain). Reformatted by Word Study, wording unchanged. All sources and licenses.