هُوَ كَرِيمٌ؛ يُعِينُ الْمُحْتَاجَ.
He is generous; he helps those in need.
The second clause explains the first by giving a manifestation of generosity. When one clause elaborates or confirms another, the semantic bond can be close enough for separation without an explicit conjunction.
Rhetorical faṣl does not necessarily mean conceptual disconnection. Clauses may be tightly related without a written conjunction.