«وَالرَّبْعُ كَالْفِرْدَوْسِ»
My former dwelling was like paradise.
Rabʿ can mean a dwelling or inhabited quarter, while firdaws evokes a luxuriant garden. The comparison brings together ease, attractiveness and cherished memories of place.
The verse is an imaginative simile, not a literal description of the city as paradise. Such idealization is characteristic of nostalgia: the former home becomes more radiant as the speaker recounts what has been lost.
Ladhdhāt ʿamīmah reinforces the abundance of pleasures remembered from that place.