וַיָּ֥רֶב הָעָ֖ם עִם־מֹשֶׁ֑ה וַיֹּאמְר֣וּ לֵאמֹ֔ר וְל֥וּ גָוַ֛עְנוּ בִּגְוַ֥ע אַחֵ֖ינוּ לִפְנֵ֥י יְהוָֽה׃
And the people strove with Moses, and spoke, saying: ‘Would that we had perished when our brethren perished before the LORD!
Read halakhic rulings (Jewish law) on Numbers 20:3: and classical halakhic sources.