1 Nephi 4:12
"Slay him, for the Lord hath delivered him into thy hands;"
The Lord isn't going to give us a task of slaying somebody now a days. We have different trial and different things we need to complete those. Heavenly Father will always provide a way for us to accomplish those things. Also since He gives us ways to accomplish these things we need to keep our standards and stand our ground. We should not be movable. We should be firmly planted in our believes that when we are asked to do something that we can carry out and accomplish those things. Remember "I can do all things through Christ which strengtheneth me" (Philippians 4:12).