‘ And they took them from the midst of the tent, and brought them to Joshua and to the children of Israel, and they poured them out before YHWH.'
The recovery of these devoted things not only concerned Joshua but the whole of Israel. All were involved and concerned for their recovery. All would benefit. ‘Poured them out' may give an indication that their restitution to YHWH was seen as a kind of offering (Leviticus 8:15; Leviticus 9:9 compare especially 2 Samuel 15:24 where the Ark was ‘poured out' before David when he fled, a kind of offering to him by his loyal subjects). They were restored to their rightful place.