«وَهُوَ مِنَ الْحَيْرَةِ فِي تَمَلْمُلِ / فَهَلْ بِهَذَا الرَّبْعِ عَذْبُ الْمَنْهَلِ»
He turns restlessly in confusion: does this dwelling offer sweet water and relief?
Tamal mul denotes restless shifting; rabʿ a dwelling site; manhal a watering place. A sweet watering place also suggests welcome and comfort for a traveller in need.
The syntax asks a real question, but the underlying communicative act is a request: can this place offer him relief?