John Chrysostom
As the creatures that came into existence were precisely as he envisioned for himself, he distinguished them, thereby creating a unique group for himself.
And Jacob separated the flock, and put the rods in the troughs before the eyes of the rams; and all the white and the black were Laban's, and the rest were Jacob's, when the flocks were separated one from the other.
וְהַכְּשָׂבִים֮ הִפְרִ֣יד יַעֲקֹב֒ וַ֠יִּתֵּן פְּנֵ֨י הַצֹּ֧אן אֶל־עָקֹ֛ד וְכָל־ח֖וּם בְּצֹ֣אן לָבָ֑ן וַיָּֽשֶׁת־ל֤וֹ עֲדָרִים֙ לְבַדּ֔וֹ וְלֹ֥א שָׁתָ֖ם עַל־צֹ֥אן לָבָֽן׃
3 Church Fathers comment on this verse
As the creatures that came into existence were precisely as he envisioned for himself, he distinguished them, thereby creating a unique group for himself.
Jacob is recorded as having established distinct flocks for himself, intentionally keeping them apart from Laban’s cattle, as the sacred cannot coexist with the secular and the unclean cannot mingle with the pure (cf. 2 Cor. 6:14-15).
The diverse cattle acquired should be distinguished from the white ones, ensuring that during the time of conception, the variegated cattle are visible to the white ones, while the white cattle remain out of sight from the variegated. This arrangement facilitates the birth of variegated offspring from the white, but not the reverse.