. The Ghassanids and the Kalb essentially supplanted the limes. The Ghassanid phylarch Arethas passed through the depression on his way to defeating the Banu Tamim. Likewise, Alqama, a poet of the latter tribe, passed through Wadi Sirhan to meet with Arethas to lobby for his brother's release from captivity.

Early Islamic era

Following the Muslim conquest in 634 CE,

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