11And that ye study to be quiet, and to do your own business, and to work with your own hands, as we commanded you; 12That ye may walk honestly toward them that are without, and that ye may have lack of nothing. 13But I would not have you to be ignorant, brethren, concerning them which are asleep, that ye sorrow not, even as others which have no hope. 14For if we believe that Jesus died and rose again, even so them also which sleep in Jesus will God bring with him.

Read 1 Thessalonians 4