What nuance does baʿḍa hādhā al-tadallul add to verse 19?

Imruʾ al-Qays: Address to Fāṭimah, Parting, and the Arrows of the Eyes (Verses 19–22)

• A request to reduce the aloof behavior, not an absolute prohibition
• A command that she separate immediately
• A fixed duration for the poet’s journey
• The beginning of an unrelated love episode