The Term Trinity is not in the Bible either.
Penal Substitution is understood to be taught in Isaiah 53:6 and Romans 5:8.
Strawman.
The term is not BUT I am not saying that the term even should be in the Bible.
I am talking about doctrine. Who cares what we call the doctrines????
Isaiah 53 and Romans 5 do not actually teach Penal Substitution Theory. Those chapters teach what God has delivered to us as that text.
You read the theory into the passages.
That is why you cannot highlight that God punished Jesus for our sins in your Bible. You can't provide the words you are translating "Jesus suffered God's wrath".
You hold a re-formed Roman Catholic theory based on a legal philosophy that has died because it proved false.
IF you believed the actual text of Scripture you would see the foolishness of your theory. But I was once there as well. I understand you cannot.