"v.16 concerning the signs of my coming… v.20 And this [Kirtland] Temple which ye now see shall be thrown down that there shall not be left one stone upon another. v.21 And it shall come to pass, that this generation of Jews shall not pass away until every desolation which I have told you concerning them shall come to pass. v.37 Ye look and behold the fig trees, and ye see them with your eyes, and ye say when they begin to shoot forth, and their leaves are yet tender, that summer is now nigh at hand; v.38 Even so it shall be in that day when they shall see all these things, then shall they know that the hour is nigh. v.39 And it shall come to pass that he that feareth me shall be looking forth for the great day of the Lord to come, even for the signs of the coming of the Son of Man."
[D&C 45: 16-39, as quoted in The Last Days and December 1890 2nd Coming of Jesus Christ, y George D. Speer Sr., privately circulated]