Luke 12:39-40

12:39 But understand this: If the owner of the house had known at what hour the thief ¹  was coming, he would not have let ²  his house be broken into. 12:40 You also must be ready, because the Son of Man will come at an hour when you do not expect him.” ³ 

[12:39]  ¹ sn On Jesus pictured as a returning thief, see 1 Thess 5:2, 4; 2 Pet 3:10; Rev 3:3; 16:15.

[12:39]  ² tc Most mss (א¹ A B L Q W Θ Ψ 070 Ë^1,13 33 Ï lat sy^p,h sa^ms bo) read “he would have watched and not let” here, but this looks like an assimilation to Matt 24:43. The alliance of two important and early mss along with a few others (Ì⁷⁵ א* [D] e i sy^s,c sa^mss), coupled with much stronger internal evidence, suggests that the shorter reading is authentic.

[12:40]  ³ sn Jesus made clear that his coming could not be timed, and suggested it might take some time – so long, in fact, that some would not be looking for him any longer (at an hour when you do not expect him).