וְלִבְנֵ֤י הַפִּֽילַגְשִׁים֙ אֲשֶׁ֣ר לְאַבְרָהָ֔ם נָתַ֥ן אַבְרָהָ֖ם מַתָּנֹ֑ת וַֽיְשַׁלְּחֵ֞ם מֵעַ֨ל יִצְחָ֤ק בְּנוֹ֙ בְּעוֹדֶ֣נּוּ חַ֔י קֵ֖דְמָה אֶל־אֶ֥רֶץ קֶֽדֶם׃
But unto the sons of the concubines, that Abraham had, Abraham gave gifts; and he sent them away from Isaac his son, while he yet lived, eastward, unto the east country.
Read kabbalistic (mystical) interpretation of Genesis 25:6: and classical mystical sources.