On the Christian emigration from Hauran in the XVIIth century

Historian Kamal Salibi, in an article titled “Bhamdoun: Portrait of a Lebanese Mountain Village” and published in 1997 for the Center for Lebanese Studies at Oxford University, wrote that

“In the latter half of the seventennth century, […] a large scale Christian migration from the Hawran region to Transjordan, Palestine and the Lebanon was triggered by the weakening of the Ottoman control over the bedouin tribes of the Syrian desert.”

I am very curious to know his sources.