36:3 And they received of Moses all the offering, which the children of Israel had brought for the work of the service of the sanctuary, to make it withal. And they brought yet unto him free offerings every morning.
36:20 And he made boards for the tabernacle of shittim wood, standing up.
i.e. free will, (See Scofield "2 Corinthians 8:1") .
36:36 And he made thereunto four pillars of shittim wood, and overlaid them with gold: their hooks were of gold; and he cast for them four sockets of silver.