In Genesis 24:2-9, the servant recounts the original oath scene he's now retelling. This is a direct narration of the same covenant Abraham made with him.

In Genesis 27:46, Rebekah expresses the same concern in reverse — she's weary of Hittite women and wants Jacob sent to find a wife from her family instead.

In Genesis 28:1, Isaac repeats this same command to Jacob — do not marry Canaanite women but go to Paddan-Aram. The family concern continues across generations.

In Ezra 9:1-3, Israel has done exactly what Abraham forbade — intermarried with pagan peoples. This is the negative consequence of ignoring such warnings.