فَرُبَّ أُكْلَةٍ هَاضَتِ الْآكِلَ وَحَرَمَتْهُ مَا أَكَلَ
Many a meal has harmed the eater and deprived him of the benefit of what he ate.
Uklah denotes a meal; ākil is its eater. Hāḍat in this context means that the meal harmed him. It should not be mistaken for an ordinary modern Urdu use of the term “digestion.”
The construction is proverbial: an apparent benefit may turn against its recipient. Rubba introduces such occurrences, not an assertion that every meal always causes harm.
Semantic distinction exercise
What does hāḍat al-ākil mean in this context?