וְהוֹדַעְתֶּ֖ם אֶת־בְּנֵיכֶ֣ם לֵאמֹ֑ר בַּיַּבָּשָׁה֙ עָבַ֣ר יִשְׂרָאֵ֔ל אֶת־הַיַּרְדֵּ֖ן הַזֶּֽה׃
then ye shall let your children know, saying: Israel came over this Jordan on dry land.
Read halakhic rulings (Jewish law) on Joshua 4:22: and classical halakhic sources.