This is the passage where Aaron and his sons are ordained into the priesthood.  They were dressed, anointed, consecrated and dedicated to the work.

They had the anointing oil poured over them, symbolizing the Holy Spirit.  They had the blood put on their ear, their thumb and their toe symbolizing they were to listen, serve and follow

We are all called a kingdom of priests in the New Testament and we too are dressed, anointed, consecrated and dedicated to the work He sets before us.  Our job is to trust that call, trust the calling and trust the caller.  Trust the gift, trust the gifter and trust His gifting.