# Fear the one who, after ... has authority
The phrase "the one" refers to God. Alternate translation: "Fear God who, after ... has authority" or "Fear God, because after ... he has authority"
# after he has killed
"after he kills you"
# has authority to throw you into hell
This is a general statement about God's authority to judge people. It does not mean that he will do this to the disciples. Alternate translation: "has authority to throw people into hell"