أَمَّا بَعْدُ
Now then; a transition to the next topic.
“Ammā baʿd” is a conventional division and transition formula in prose. A beautiful takhalluṣ is more specific: it joins prelude to purpose by a meaningful and suitable bridge, not merely by announcing a change of subject.
Without an integrated link, the case may fall under abrupt transition (iqtiḍāb). A connective phrase alone does not prove graceful transition; the relation between the two themes does.