Where in the Bible does it say what wood was used for his cross?
The Bible doesn't say.
Another answer from our community: Noah's ark was built of cypress wood. Some versions of the Bible refer to the building material as 'gopher wood'. The term comes from the Hebrew, and actually refers to what we know as wood from the cypress tree. According to the Bible, he used a wood called gopher wood.
Doesn't say. Answer Actually the only reference tovJesus being hung on a 'tree' comes from one of Paul's letters where he speaks poetically. Jesus was crucified on a cross-shaped or T-shaped cross, which was thhe standard method of execution for the Romans at that time, for common criminals who were not Roman citizens. The Bible gives no indication of the kind of wood from which the cross was made.