וְהָיָ֗ה בְּכָל־יַחֵם֮ הַצֹּ֣אן הַמְקֻשָּׁרוֹת֒ וְשָׂ֨ם יַעֲקֹ֧ב אֶת־הַמַּקְל֛וֹת לְעֵינֵ֥י הַצֹּ֖אן בָּרֳהָטִ֑ים לְיַחְמֵ֖נָּה בַּמַּקְלֽוֹת׃
e todas as vezes que concebiam as ovelhas fortes, punha Jacó as varas nos bebedouros, diante dos olhos do rebanho, para que concebessem diante das varas;
Targum Jonathan on Genesis
And it was that whenever the early (prime) sheep conceived, Jakob set the rods in the canals before the eyes of the sheep, that they might conceive before the rods.