"for this thing is beyond your strength": He said to him: Look at that beam. When it is moist, two or three get under it but cannot lift it; four or five get under it and can lift it. "For this thing is beyond your strength you will not be able to do it alone."
Jethro Watched His Son-in-law Moses Judging the Entire Nation
Mekhilta Tractate Amalek 4:9