No One Knows the Day or Hour
36 “But of that day and hour no one knows, not even the angels of heaven, but My Father only. 37 But as the days of Noah were, so also will the coming of the Son of Man be. 38 For as in the days before the flood, they were eating and drinking, marrying and giving in marriage, until the day that Noah entered the ark, 39 and did not know until the flood came and took them all away, so also will the coming of the Son of Man be. 40 Then two men will be in the field: one will be taken and the other left. 41 Two women will be grinding at the mill: one will be taken and the other left. 42 Watch therefore, for you do not know what hour[b] your Lord is coming. 43 But know this, that if the master of the house had known what hour the thief would come, he would have watched and not allowed his house to be broken into. 44 Therefore you also be ready, for the Son of Man is coming at an hour you do not expect. —Matthew 24:36-44 (NKJV)
And then God was all like:
20 But the prophet who presumes to speak a word in My name, which I have not commanded him to speak, or who speaks in the name of other gods, that prophet shall die.’ 21 And if you say in your heart, ‘How shall we know the word which the LORD has not spoken?’— 22 when a prophet speaks in the name of the LORD, if the thing does not happen or come to pass, that is the thing which the LORD has not spoken; the prophet has spoken it presumptuously; you shall not be afraid of him. Deuteronomy 18:20-22 (NKJV)
Via Brett Terpstra and Walton Jones, with text from Bible Gateway.