«مَا فِيهِمْ إِلَّا مَنْ يُحْفَظُ عَنْهُ وَلَا يُتَحَفَّظُ مِنْهُ»
Every person there offered words worth preserving and posed no need for wariness.
Yuḥfaẓu ʿanhu means that valuable statements can be remembered from him; yutaḥaffaẓu minhu means being on guard against him.
The two forms echo the root ḥ-f-ẓ but differ through their constructions and prepositions. The phrase praises both learning and trustworthy character.
Yamīlu ilayhi / yamīlu ʿanhu contrast attraction and turning away through their prepositions, completing the portrait of agreeable companionship.