Albert Barnes Commentary Joshua 23:2

"that Joshua called for all Israel, for their elders and for their heads, and for their judges and for their officers, and said unto them, I am old and well stricken in years:" — Joshua 23:2 (ASV)

All Israel, and for their elders - Omit “and,” which is not in the Hebrew. The meaning is that Joshua summoned to him all Israel as represented by its elders, etc. (Deuteronomy 1:15). This gathering probably took place at the tabernacle at Shiloh.