«لِي مِنْ فُلَانٍ صَدِيقٌ حَمِيمٌ»
From that person, I have an intimate friend, as though drawn out of him.
The particle min suggests an imagined second friend abstracted from the original person, whose actual friendship is being praised. A literal reading that posits two people misses the rhetoric.
Tajrid can also use fi, baʾ, or self-address. The common purpose is to intensify the perceived perfection of a quality.