The tenth part of an ephah, about a pottle of our measure. See Exodus 16:36. He shall put no oil upon it, neither shall he put any frankincense thereon; either to distinguish these from the meat-offerings, Leviticus 2:1; or as a fit expression of their true sorrow for their sins, in the sense whereof they were to abstain from things pleasant and delightful; see Numbers 5:15; or to signify that by his sins he deserved to be utterly deprived both of the oil of gladness, the gifts, graces, and comforts of the Holy Ghost, and of God's gracious acceptance of his prayers and sacrifices, which is signified by incense, Psalms 141:2; or to teach them how evil a thing sin was, how hateful to God, and how uncomfortable to themselves.
Related Commentaries of Leviticus 5:11
Leviticus 5:11
11 But if he be not able to bring two turtledoves, or two young pigeons, then he that sinned shall bring for his offering the tenth part of an ephah of fine flour for a sin offering; he shall put no oil upon it, neither shall he put any frankincense thereon: for it is a sin offering.