The shortest reply is not invariably the best. When a situation invites elaboration, affection, or a sustained exchange, mentioning the subject can help unfold the discourse appropriately. This is called expansion where attentive listening is desired.
هِيَ عَصَايَ أَتَوَكَّأُ عَلَيْهَا
It is my staff; I lean upon it.
Moses' response about his staff provides a classic example of an extended answer that suits its moment. Eloquent communication cannot be reduced to the fewest possible words; an appropriate fuller response may achieve an effect that bare brevity would not.
The enlargement must nevertheless remain relevant. Rhetorical expansion is distinguished from purposeless digression by its relationship to the speaker's aim and the listener's situation.