The first mention of "liberty" does not occur in discussion about the Year of Jubilee, or even in regards to the release of the Israelites from Egypt.
The first mention occurs in the above passage, and in the word "pure"/
What does all of this talk about spices and perfume have to do with liberty?
It has to do with all our sins forgiven at the Cross, and every demand for retribution or payment fully paid for at the Cross.
The passage above describes the anointing oil following the sacrifices under the Old Covenant, and it was only for the priests:
"And thou shalt anoint Aaron and his sons, and consecrate them, that they may minister unto me in the priest's office. 31And thou shalt speak unto the children of Israel, saying, This shall be an holy anointing oil unto me throughout your generations." (Exodus 30: 30-31)
This oil speaks of the Holy Spirit, whom we all receive because of the full forgiveness of sins in Christ Jesus:
"And he commanded us to preach unto the people, and to testify that it is he which was ordained of God to be the Judge of quick and dead. 43To him give all the prophets witness, that through his name whosoever believeth in him shall receive remission of sins. 44While Peter yet spake these words, the Holy Ghost fell on all them which heard the word." (Acts 10: 42-44)
The Holy Spirit falls into our lives because of the full remissions of sins through Jesus' blood.
Through His blood, we are cleansed of all unrighteousness:
"7But if we walk in the light, as he is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleanseth us from all sin. 8If we say that we have no sin, we deceive ourselves, and the truth is not in us. 9If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness" (1 John : 7-9)
Through the Holy Spirit. we receive liberty:
"Now the Lord is that Spirit: and where the Spirit of the Lord is, there is liberty." (2 Corinthians 3: 17)
We are called to liberty through His righteousness and this righteousness is a gift which we receive through the blood of Jesus.