Luke 12:54-57,
54 And he said also to the people, When ye see a cloud rise out of the west, straightway ye say, There cometh a shower; and so it is.

55 And when ye see the south wind blow, ye say, There will be heat; and it cometh to pass.

56 Ye hypocrites, ye can discern the face of the sky and of the earth; but how is it that ye do not discern this time?

57 Yea, and why even of yourselves judge ye not what is right?