לֹא־תֵלֵ֤ךְ רָכִיל֙ בְּעַמֶּ֔יךָ לֹ֥א תַעֲמֹ֖ד עַל־דַּ֣ם רֵעֶ֑ךָ אֲנִ֖י יְהוָֽה׃
你不可在你的族人中往來搬弄是非；你的鄰舍有性命危險時，你不可袖手旁觀。我是永恆者。
Sanhedrin
Our Rabbis taught [in a baraita]: From where do we learn that one who chases after his friend to kill him may be saved [at the expense] of his life? The Torah says [Leviticus 19:16], "Do not stand by the blood of your neighbor." You're right! [the passuk is unavalibe to be used here]