1 Chronicles 12:33
Of Zebulun, such as went forth to battle, expert in war, with all instruments of war, fifty thousand, which could keep rank: they were not of double heart.
Torrey's Topical Textbook—AKJV

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