"When it comes to how we should deal with evil doers, the Bible, in the book of Romans, is very clear: God has endowed rulers full power to use whatever means necessary-including war-to stop evil", Jeffress said in a statement.
Pointing to a biblical passage in Romans 13, Jeffress insisted God gave Trump the moral authority to punish the North Korean dictator.
Jeffress also tweeted yesterday afternoon that he's thankful for a President who is serious about protecting our country. They are God's servants, agents of wrath to bring punishment on the wrongdoer.
North Korea said on August 9 that it is considering a missile strike on the US territory of Guam.
Those threats come as The Washington Post reports that North Korea "has successfully produced a miniaturized nuclear warhead that can fit inside its missiles", and are well on their way to becoming a nuclear power.
Citing biblical passage Romans 13, Jeffress said that the U.S. government has the divine authority 'to do whatever, ' including 'assassination, capital punishment or evil punishment to quell the actions of evildoers like Kim Jong Un'.
The senior pastor of First Baptist Church in Dallas was a member of Trump's evangelical advisory committee during the 2016 presidential election and since has attended several meetings of prominent evangelicals at the White House, including a dinner ahead of the National Day of Prayer at which he said: 'Mr President, we're going to be your most loyal friends'.
U.S. Secretary of State Rex Tillerson spoke to reporters Wednesday after President Donald Trump and North Korea traded escalating threats of "fire", with the North saying it was examining plans for attacking Guam to contain U.S. bases there.
"I think many evangelicals, like most Americans, really don't pay attention to global affairs".
Mr Jeffress is the pastor of the 12,000 member First Baptist Church in Dallas and hosts a television programme that is broadcast on 1,200 channels in the U.S. and 28 other countries.
Yesterday two Air Force B-1B fighter jets took off from the United States base on Guam alongside bombers from Japan and South Korea, in a blatant display of American military strength.
In a sermon, he said: "You see, God is not against building walls".