Sabtah

Rest, the third son of Cush (Genesis 10:7; 1 Chronicles 1:9).

Source: Easton's Bible Dictionary
Sabtah

(striking ), (Genesis 10:7) or Sab’ta, (1 Chronicles 1:9) the third in order of the sons of Cush. (B.C. 2218.)

Source: Smith's Bible Dictionary