It may be an old chestnut, but I've never heard it.There is an old chestnut, "Jesus saves, but Moses invest."
What does it mean? Thanks.
This is not the joke. Sorry.Moses invested Aaron with the priesthood.
The question was about explaining the joke, not eliciting opinions about its humor.If the first part about Jesus is a double-entendre mixing religion and finances, it makes sense that the second part about Moses should also be a double entendre along the same lines. Just limiting the joke to usurious practices among the Jews isn't funny nor creative. Give whoever came up with the joke credit that they perceived a pattern and imitated it.