Hey bro....
Abandoning the teachings of God
Abandoning the teachings of Allah
It's the same thing.
Whether it's Jews, Christians, or Islam, if they misunderstand the words of scripture from God, they are all the same. They are all beasts, and in biblical terms, they are wolves in sheep's clothing.
In the Bible.
Can't buy or sell, means people who can't buy the truth of God and who can't sell the truth of God
In other words, People cannot understand God's truth correctly, and God's truth cannot be properly taught.
Or,You can understand it this way,Jesus wants to sell the Bible to someone, but someone buy from Satan and thinking that is the real Bible.(I didn't refer to the Quran or Muslims here)
I hope you could understand it.