Lukas 12:39

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.

Lukas 23:48

23:48 And all the crowds that had assembled for this spectacle, when they saw what had taken place, returned home beating their breasts. 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.

[23:48]  ³ sn Some apparently regretted what had taken place. Beating their breasts was a sign of lamentation.