 The descendants of Abraham and <unk> are called Ishmaelites , after Ishmael , their firstborn , and the Qedarites are named for his second son , Qedar . The Bible refers to both the Qedarites and Qedar frequently . Old Testament references include Genesis ( 25 : 13 ) , Isaiah ( 21 : 16 @-@ 17 , 42 : 11 , 60 : 7 ) , Jeremiah ( 2 : 10 , 49 : 28 @-@ 33 ) , Ezekiel ( 27 : 21 ) , and Chronicles ( 1 : 29 ) . Twice , Qedar is used to refer to the actual son of Ishmael , as in the books of Genesis and Chronicles , while remaining references are to his descendants , referring either to his most prominent North Arabian sons , or to the Arabs and Bedouins as a more general collective . The " tents of Kedar " equated with " the peace @-@ <unk> <unk> " mentioned in the Book of <unk> ( 120 : 5 ) were likely a Qedarite sub @-@ group . 
