Joshua called for all Israel - There are four degrees of civil distinction mentioned here:
1. זקנים zekenim, the elders or senate, the Princes of the tribes.
2. ראשים rashim or rashey aboth, the Chiefs or Heads of families.
3. שפטים shophetim, the Judges who interpreted and decided according to the law.
4. שטרים shoterim, the Officers, serjeants, etc., who executed the decisions of the judges.
Whether this assembly was held at Timnath-serah, where Joshua lived, or at Shiloh, where the ark was, or at Shechem, as in Jos 24:1, we cannot tell. Some think that the meaning here, and that mentioned in Jos 24:1, were the same, and if so, Shechem was the place of assembling; but it is more likely that the two chapters treat of two distinct assemblies, whether held at the same place or not.

And Joshua called for all Israel,.... Summoned them together, whether at Timnathserah, his own city, he being old and infirm, and not able to go elsewhere; or whether at Shechem, where it is plain they were afterwards convened, Jos 24:1, or whether rather at Shiloh, where the tabernacle was, is not certain; and by "all Israel" cannot be meant the whole body of the people, unless it can be thought to be at one of the feasts, when all the males in Israel appeared before the Lord; though this seems to be not a stated convocation, but occasionally made, and to be understood of the representatives of the people called together, as explained in the following clause:

and for their elders, and for their heads, and for their judges, and for their officers; the first and is supplied, and another word or words may be supplied, as "even", or "that is", or the like, and so explanative of all Israel, namely, "their elders", both in age and office, especially the latter, the seventy elders, or who composed what in later times was called the great sanhedrim; and the "heads" of their tribes, the chief princes of every tribe; and their "judges" in their several cities, who heard and tried causes, and administered justice and judgment to the people; and their "officers", who attended on them to execute the judgment they pronounced:

and said unto them, I am old and stricken in age; which he observes as a reason of his calling them together to give them some advice and instructions before his death, and in order to command greater reverence of him, and respect to him, and to excite attention to what he had to say to them.

Joshua called for all Israel--The clause which follows seems to restrict this general expression as applicable only to the officers and representatives of the people. The place of assembly was most probably Shiloh. The occasion of convening it was the extreme age and approaching death of the venerable leader; and the purport of this solemn address was to animate the chosen people and their posterity to a faithful and unswerving continuance in the faith and worship of the God of Israel.