Lewis & Short

Săcae (Săgae), ārum, m., = Σάκαι, a people of Northern Asia, a part of the Scythians, Mel. 3, 7, 1; Plin. 6, 17, 19, § 50; Curt. 5, 9, 5; 7, 4, 6; Cat. 11, 6.
In sing.: Săces (Σάκης), Claud. Laud. Stil. 1, 157.