Ecclesiastes 10:10 - If the iron be blunt, H6949 and he do not whet the edge, then must he put to more strength: but wisdom is profitable to direct.
Jeremiah 31:29 - In those days they shall say no more, The fathers have eaten a sour grape, and the children's teeth are set on edge. H6949
Jeremiah 31:30 - But every one shall die for his own iniquity: every man that eateth the sour grape, his teeth shall be set on edge. H6949
Ezekiel 18:2 - What mean ye, that ye use this proverb concerning the land of Israel, saying, The fathers have eaten sour grapes, and the children's teeth are set on edge? H6949