Charles Spurgeon Commentary Deuteronomy 29:18

"lest there should be among you man, or woman, or family, or tribe, whose heart turneth away this day from Jehovah our God, to go to serve the gods of those nations; lest there should be among you a root that beareth gall and wormwood;" — Deuteronomy 29:18 (ASV)

For the worship of false gods is the cause of untold mischief and evil: wherever it is found it is a root that bears gall and wormwood, and God would not have it in a single individual, man or woman, no, not in a single family or tribe.