Hejaz
Historically, the Hejaz has always seen itself as separate from the rest of Saudi Arabia. The Hejaz is the most populated region in Saudi Arabia; 35% of all Saudis live there. Hejazi Arabic is the most widely spoken dialect in the region. Saudi Hejazis are of ethnically diverse origins.
Levantine Arabic
The primary division between Arabic dialects in ancient times was between Northern Old Arabic, spoken in the southern Levant, and Old Hijazi, spoken in the northern, and later central Hijaz. The main representatives of Northern Old Arabic were Safaitic, Hismaic, and Nabataean Arabic. Tens of thousands of graffiti in the Safaitic and Hismaic scripts cover the deserts of southern Syria and present-day Jordan. The Safaitic inscriptions sometimes exhibit the article ʾ(l), a shared areal isogloss with the Arabic substrate of the Nabataean inscriptions. Many Safaitic inscriptions exhibit all of the features typical of Arabic. The Hismaic script was used to compose two long texts in an archaic stage of Arabic before the language acquired the definite article.