فَأَنْتَ عَنْهُ تَلَهَّىٰ
You divert your attention from him (to the other).
But you neglect him and pay him no regard.
him didst thou disregard!
Him thou neglectest!
So you leave him, and are engrossed elsewhere!
From him were you unmindful (or distracted).
So you are from him distracted/preoccupied .
you gave no heed.
Nay, surely it is a Reminder.
you ignore him.
From him thou art distracted.
From him will you divert yourself.
Of him you are neglectful and divert your attention to another,
Of him wast thou unmindful.