So I always thought Jeremiah 31 when the LORD speaks of a new covenant
that Jeremiah is referring to The Father or Jesus speaking as the LORD. According to Hebrews10:15-17, it’s the Holy Spirit who is
talking about Jesus. Interesting. So that’s one of many verses in the New
Testament that indicates the Holy Spirit's Godhood. The book of Hebrews has
always interested me, curious as to who the author is, to which I really think
is Paul considering Paul's life previous to seeing Jesus, being a Pharisee. Though, this isn't exactly a good answer as there were many Pharisees who converted during Paul's time, it just seems more fitting.