Answer: lovethyneighbor

AnswerCrossword Clue
LOVETHYNEIGHBORAdvice from the Bible
LOVETHYNEIGHBORMaxim dating from 600 B.C.
LOVETHYNEIGHBORFamiliar injunction.
LOVETHYNEIGHBORBiblical directive for cooperation
LOVETHYNEIGHBORCrosby hit: 1934