PS - just to add: There are some questions regarding whether Mark chapter 16, verses 9-20 belong in the Bible. There is some evidence that these verses were not originally part of the Gospel of Mark. Some of the oldest and most reliable Greek manuscripts of the Gospel of Mark do not contain verses 9-20. Some other manuscripts contain Mark 16:9-20, but set them apart from the rest of the Gospel of Mark. As a result, it is not wise to use anything from Mark 16:9-20 as the sole basis for a doctrine or practice. Snake handling is one such example of a dubious concept from Mark 16:9-20.
Hope this answers your question.