In these words Moses appears to combine the recollection of two distinct things:

1. The advice of Jethro (Exodus 18), by foll…

And I charged your judges. This charge is not found in Exodus 18, where Moses's only object was to point out the origin of the change; but…

And I charged your judges at that time
When they were appointed and constituted, even the heads and rulers before sp…

Moses reminds the people of the beneficial arrangement of their government, which could make them all secure and at ease, if it were not their own …