וַיְדַבֵּ֤ר מֹשֶׁה֙ אֶל־רָאשֵׁ֣י הַמַּטּ֔וֹת לִבְנֵ֥י יִשְׂרָאֵ֖ל לֵאמֹ֑ר זֶ֣ה הַדָּבָ֔ר אֲשֶׁ֖ר צִוָּ֥ה יְהוָֽה׃
And Moses spoke unto the heads of the tribes of the children of Israel, saying: This is the thing which the LORD hath commanded.
Read halakhic rulings (Jewish law) on Numbers 30:2: and classical halakhic sources.