Kejadian 2:13

2:13 The name of the second river is Gihon; it runs through ¹  the entire land of Cush. ² 

Kejadian 21:3

21:3 Abraham named his son – whom Sarah bore to him – Isaac. ³ 

[2:13]  ¹ tn Heb “it is that which goes around.”

[2:13]  ² sn Cush. In the Bible the Hebrew word כּוּשׁ (kush, “Kush”) often refers to Ethiopia (so KJV, CEV), but here it must refer to a region in Mesopotamia, the area of the later Cassite dynasty of Babylon. See Gen 10:8 as well as E. A. Speiser, Genesis (AB), 20.

[21:3]  ³ tn Heb “the one born to him, whom Sarah bore to him, Isaac.” The two modifying clauses, the first introduced with an article and the second with the relative pronoun, are placed in the middle of the sentence, before the name Isaac is stated. They are meant to underscore that this was indeed an actual birth to Abraham and Sarah in fulfillment of the promise.