Today is Shavuot (Pentecost). As disciples of Jesus we celebrate the giving of the Holy Spirit in Acts 2. Shavuot is a holy day commanded by the LORD (Leviticus 23:15-16) that commemorates the giving of Torah (Exodus 19-20:23).
The giving of the Law. The giving of the Spirit. Pentecost pictures.
Jeremiah 31:33 (ESV)
33 For this is the covenant that I will make with the house of Israel after those days, declares the LORD: I will put my law within them, and I will write it on their hearts. And I will be their God, and they shall be my people.
Hebrews 10:12–18 (ESV)
12 But when Christ had offered for all time a single sacrifice for sins, he sat down at the right hand of God, 13 waiting from that time until his enemies should be made a footstool for his feet. 14 For by a single offering he has perfected for all time those who are being sanctified.
15 And the Holy Spirit also bears witness to us; for after saying,
16 “This is the covenant that I will make with them
after those days, declares the Lord:
I will put my laws on their hearts,
and write them on their minds,”
17 then he adds,
“I will remember their sins and their lawless deeds no more.”
18 Where there is forgiveness of these, there is no longer any offering for sin.