وَفَى خَالِدٌ بِوَعْدِهِ. الْوَفَاءُ سِمَةُ الْكِرَامِ.
Khalid kept his promise. Keeping promises is a mark of noble character.
The second clause moves from a particular event to a broader proposition. If the context values Khalid’s conduct, this can perform tadhyīl: an independent general maxim strengthens the earlier particular statement.
Yet a maxim does not automatically form an epilogue. If the following clause begins an unrelated topic, it is merely another report. The decisive criterion is that the appended judgment genuinely includes or reinforces the preceding meaning.