יהושע ד:ג פירוש: רש״י

And cross them over with you. To fulfil the command of Moshe to build with them an Altar on Mt. Eivel, and to write upon them the words of Torah. On that same day they came to Mt. Eivel and built with them the Altar. They offered up burnt-offerings and peace-offerings, and they ate and drank. They then scraped the stones, and came and lodged in Gilgal.