«وَلَا أُفْرِغُ ثَنَائِي عَلَى مَنْ يُفْرِغُ إِنَائِي»
I do not pour out praise on someone who empties my vessel.
Praise is imagined as liquid poured out; a vessel is literally emptied. Repeating afrighu/yufrighu with unlike objects creates a pointed contrast between verbal generosity and material deprivation.
The speaker argues for reciprocity in companionship. One may evaluate that ethic separately, but the immediate argument is that unqualified praise should not reward someone who repeatedly drains one’s resources.
Applied question
What contrast is sharpened by the repeated verb?