Cross reference
1 Chronicles 12:33
33 Of Zebulun, such as were able to go out in the host, that could set the battle in array, with all manner of instruments of war, fifty thousand, and that could order `the battle array, and were' not of double heart.
Psalms 12:2
2 They speak falsehood every one with his neighbor: With flattering lip, and with a double heart, do they speak.
John 1:47
47 Jesus saw Nathanael coming to him, and saith of him, Behold, an Israelite indeed, in whom is no guile!