50 the lord of that servant will come on a day he least expecteth, and at an hour of which he is not aware
Matthew 24:50 Cross References - Thomson
Proverbs 29:1
1 Better is a man of experience, than a man who is stiff-necked: for when the latter is suddenly burned, there is no healing him.
Matthew 24:42-44
42 Watch therefore, because you know not at what season your lord cometh.
43 But this you know, that if the master of a family knew at what watch the thief would come, he would be upon guard and not suffer him to break into his house.
44 Be ye therefore ready prepared, because the son of man cometh at an hour you least expect.
1 Thessalonians 5:2-3
Revelation 3:3
3 Remember therefore how thou hast received, and heard, and keep fast hold, and reform. For if thou wilt not watch, I will come against thee, as a thief, so that thou shall not know at what hour I shall come against thee.