Genesis 10:7

‘And the sons of Cush, Seba and Havilah, and Sabtah and Raamah and Sabteca. And the sons of Raamah, Sheba and Dedan.'

Here Cush has clear connections with Arabia, for Seba is Saba in Southern Arabia, Dedan is Dedan in Northern Arabia. Havilah is mentioned in Genesis 25:18 and 1 Samuel 15:7 connecting with the Ishmaelites and Amalekites. It thus also has connections with Arabia. For Raamah, inscriptions found in Sheba suggest a location north of Marib in Yemen. Sheba is well known in the Old Testament as a trading nation and is also connected with Arabia.