עַל־רָאשֵׁ֨י הֶהָרִ֜ים יְזַבֵּ֗חוּ וְעַל־הַגְּבָעוֹת֙ יְקַטֵּ֔רוּ תַּ֣חַת אַלּ֧וֹן וְלִבְנֶ֛ה וְאֵלָ֖ה כִּ֣י ט֣וֹב צִלָּ֑הּ עַל־כֵּ֗ן תִּזְנֶ֙ינָה֙ בְּנ֣וֹתֵיכֶ֔ם וְכַלּוֹתֵיכֶ֖ם תְּנָאַֽפְנָה׃
Ils sacrifient sur le sommet des montagnes et brûlent de l’encens sur les coteaux, au pied du chêne, du peuplier blanc et du térébinthe: l’ombrage en est si agréable! C’est pourquoi vos filles se prostituent et vos brus deviennent adultères.
Radak
תחת האלון, beneath the oak. This category of tree also appears in Hoseah 4,13 and in Ezekiel 27,6. According to Onkelos the word is the same as אלוני ממרא with the vowel tzeyreh, i.e. it describes a certain valley or a grove of trees. In Bereshit Rabbah 81,5 Rabbi Shemuel bar Nachman understands the meaning of the word alon as derived from the Greek, where it means “double, additional,” The Torah hints that before the mourning for Deborah was over, news reached Yaakov that his mother Rivkah had died.
Rashi
that you desired to worship idols under them, similar to what is stated (Hosea 4:13): “Under the oak and the aspen, and the elm, for its shade is good.”
Rashi
מקל לבנה STICKS OF לבנה — a tree that is called לבנה — just as you say (Hosea 4:13) “Under oaks and poplars (ולבנה)” I think it is what is called in old French tremble; English trembling-poplar, which is white.