Psalm 10:7
His mouth is full of cursing and deceit and fraud: under his tongue is mischief and vanity.
Nave's Topical Index—AKJV

Psalm 12:2
They speak vanity every one with his neighbor: with flattering lips and with a double heart do they speak.
Nave's Topical Index—AKJV

Psalm 41:6
And if he come to see me, he speaks vanity: his heart gathers iniquity to itself; when he goes abroad, he tells it.
Nave's Topical Index—AKJV