Also see definition of "Daub" in Word Study
Daub
DAUB [isbe]
DAUB - dob: "To daub" always has the meaning "to cover," "to smear with" in the Scriptures. Ezekiel compares the flatteries of the false prophets to a slight wall covered with whitewash (literally, "spittle"). See Ezek 13:10 ff; 22:28. In Ex 2:3 "daubed it with slime and with pitch" (Hebrew wattachmerah, denominative of chemar, "bitumen" or "asphalt"), "to daub" has the same meaning as in the Ezekiel passage.
Also see definition of "Daub" in Word Study