Passage
Now upon a certain day, when his sons and daughters were eating and drinking wine, in the house of their eldest brother,
Now upon a certain day, when his sons and daughters were eating and drinking wine, in the house of their eldest brother,
Job 1:11 But stretch forth thy hand a little, and touch all that he hath, and see if he bless thee not to thy face.
Job 1:12 Then the Lord said to Satan: Behold, all that he hath is in thy hand: only put not forth thy hand upon his person. And Satan went forth from the presence of the Lord.
Job 1:13 Now upon a certain day, when his sons and daughters were eating and drinking wine, in the house of their eldest brother,
Job 1:14 There came a messenger to Job, and said: The oxen were ploughing, and the asses feeding beside them,
Job 1:15 And the Sabeans rushed in, and took all away, and slew the servants with the sword; and I alone have escaped to tell thee.
The verse centers on "upon", "certain", "sons", "daughters", "eating", "drinking", "wine", and "house". It is saying that the verse draws attention to "upon" and "certain", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 12's "Then the Lord said to Satan Behold..." into verse 14's "There came a messenger to Job and...", so "upon" and "certain" belong inside that flow. In Job context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "upon" and "certain" with trust shaped by these words, not by a vague optimism outside the passage.