Йеошуа 3:5 Комментарий: Rashi

וַיֹּ֧אמֶר יְהוֹשֻׁ֛עַ אֶל־הָעָ֖ם הִתְקַדָּ֑שׁוּ כִּ֣י מָחָ֗ר יַעֲשֶׂ֧ה יְהוָ֛ה בְּקִרְבְּכֶ֖ם נִפְלָאֽוֹת׃

Иисус сказал народу: 'Освяти себя; завтра Господь сотворит чудеса среди вас.'

And Yehoshua said. This was on the third day, and the thirtieth day of mourning [for Moshe] was on the first of the three days.

הִתְקַדָשׁוּ usually means sanctify yourselves, but here it means prepare yourselves.

For tomorrow when you cross the Jordan.