'Stumbling block' in the Bible

Thou wilt sit, and thou wilt speak against thy brother; against the son of thy, mother thou wilt give a stumbling-block.

Let their table before them become a snare, and when they are in peace, a trap, {and for a stumbling block, and for a retribution to them (LXX/NT)}.

Abundant peace have those loving Thy law, And they have no stumbling-block.