Read this passage and open each verse for the full verse feed and commentary tools.
14But when ye see the abomination of desolation standing where he ought not (let him that readeth understand), then let them that are in Judaea flee unto the mountains: 15and let him that is on the housetop not go down, nor enter in, to take anything out his house: 16and let him that is in the field not return back to take his cloak. 17But woe unto them that are with child and to them that give suck in those days! 18And pray ye that it be not in the winter. 19For those days shall be tribulation, such as there hath not been the like from the beginning of the creation which God created until now, and never shall be.
Mark 13:14-19 (ASV)