וַיְהִ֗י כִּ֣י אָֽרְכוּ־ל֥וֹ שָׁם֙ הַיָּמִ֔ים וַיַּשְׁקֵ֗ף אֲבִימֶ֙לֶךְ֙ מֶ֣לֶךְ פְּלִשְׁתִּ֔ים בְּעַ֖ד הַֽחַלּ֑וֹן וַיַּ֗רְא וְהִנֵּ֤ה יִצְחָק֙ מְצַחֵ֔ק אֵ֖ת רִבְקָ֥ה אִשְׁתּֽוֹ׃
E aconteceu que, quando ele já havia permanecido ali por muito tempo, Avimelech, rei dos Plishtim, olhou pela janela e viu, e eis que Yitzchak estava brincando com Rivkah, sua esposa.
Zohar
AND BALAK THE SON OF ZIPPOR SAW, ETC. What did he see? He saw both through the window of wisdom and with his physical eyes. The tails of the skirts of the stars are the windows of wisdom, and there is one window through which the very essence of wisdom can be seen. So Balak saw with his own particular wisdom.