Tanach sobre Levítico 8:1

And He called to Moshe, and Adonoy spoke to him from the Tent of Meeting, saying:

This is what you must do for them to consecrate them to serve Me [as kohanim]. Take one young bull and two unblemished rams,

[also] unleavened bread, unleavened loaves mixed with [olive] oil. and unleavened wafers anointed with oil. You must make them with fine wheat flour.