כִּֽי־מֻלִ֣ים הָי֔וּ כָּל־הָעָ֖ם הַיֹּֽצְאִ֑ים וְכָל־הָ֠עָם הַיִּלֹּדִ֨ים בַּמִּדְבָּ֥ר בַּדֶּ֛רֶךְ בְּצֵאתָ֥ם מִמִּצְרַ֖יִם לֹא־מָֽלוּ׃
For all the people that came out were circumcised; but all the people that were born in the wilderness by the way as they came forth out of Egypt, had not been circumcised.
Read halakhic rulings (Jewish law) on Joshua 5:5: and classical halakhic sources.