JMNT(i)
39 "and they did not know (were not aware; took no note of the situation) until the down-wash (deluge; flood; cataclysm) came and washed [the] whole population away (or: picked up all [the] people to sweep [them] away) – thus (in this same way) will progressively be the presence of the Son of the Man!
40 "At that time two folks will continue being within the midst of the field: one man is being taken in hand (seized) and drawn to the side, and yet one man is repeatedly left alone to flow on his way (or: continues on pardoned [with his debts] forgiven; or: is being sent away, allowed to continue relaxing while permitted to depart).
41 "Two women are continuing to grind grain into meal and flour, within the mill (or: in the midst [of working] the millstone): one woman is being taken in hand (seized) and drawn to the side, and yet one woman is repeatedly left alone to continue [in her work] (or: pardoned; sent away; forgiven; etc., as in vs. 40).
42 "Therefore, you folks stay constantly awake, be ever alert, and continue watchful, because you have not seen, nor do you thus know, in what sort of day your Owner (Lord) is in the habit of coming (or: for what kind of day your Master repeatedly comes).
43 "Yet you are progressively coming to know that by experience (or, as an imperative: Now be personally knowing that, through normal experience), because if the householder had seen and known in what sort of watch (= which of the watches) [of the night] the thief is normally coming, he would have kept awake, remained alert and kept watchful, and then he would not let (permit) his house to be dug (or: tunneled) through.
44 "Because of this, you yourselves progressively come to be ready and prepared as well, because at an hour for (= about) which you are not normally thinking (imagining; supposing; = expecting), the Son of the Man (= the eschatological Messiah figure; humanity's son) is normally (or: repeatedly) coming.
45 "Who, consequently (or: really), is the faithful (trustworthy; loyal) and thoughtful (prudent; sensible; discreet; considerate) slave whom the owner (lord; master) set down upon (or: = places in full control over) his household servants (domestics) [with the directive] to give to them nourishment within a fitting situation (or: sustenance at the appointed time; food in season)?
46 "That slave is happy and blessed whom his owner (lord; master), upon at some point coming, will proceed in finding [him or her] habitually doing thus.
47 "Truly (Amen; It is so), I am now saying to you folks, that he will proceed in setting him down upon (or: = place him in full control over) all his possessions and things by which he normally subsists.
48 "But if that worthless (ugly; bad quality) slave should say within his heart, 'My owner (master; lord) continually delays and fails [to come] for a long time,'
49 "and then should start to repeatedly beat his fellow slaves, and may be eating and drinking with the people regularly getting drunk,
50 "the owner (lord; master) of that slave will be arriving on a day in which he is not normally anticipating, and within an hour which he is not usually knowing,