A mountain separates them/ they have become enemies/ the discord between them grew.
Figuratively: They separated from each other. They became enemies. "A black cat passed between them."
(“he was striking him a great deal; a mountain rose between them. Rabbi wept and said: If this is so in their lifetime, how much more so after their death.” (Hullin 7b) “And now a mountain stands between the Arabs and Reuven, who are not at peace together, and Shimon’s son claims his money from the Arabs.” (Responsa of the Rema, no. 89) “In his town all the young people were accustomed to come to him, but here in the Land of Israel a mountain stood between them and him.” (Agnon, Only Yesterday, p. 101) “That night something like a barrier rose between me and Brigitte.” (Agnon, Until Now, p. 31))
Translation
Expression (Hebrew)
גָּבַהּ הַר בֵּינֵיהֶם, גַּבָּהּ טוּרָא בִּינַיְהוּ
Definition (Hebrew)
בְּהַשְׁאָלָה: נִפְרְדוּ זֶה מִזֶּה. הִסְתַּכְסְכוּ. "עָבַר חָתוּל שָׁחֹר בֵּינֵיהֶם".
("הֹוֶה קָא מִבַּטַשׁ בְּיָהּ טוּבַּא,גָּבַהּ טוּרָא בִּינַיְהוּ(גָּבַהּ הַר בֵּינֵיהֶם). בָּכָה רַבִּי וְאָמַר: מָה בְּחַיֵּיהֶן כָּךְ, בְּמִיתָתָן עַל אַחַת כַּמָּה וְכַמָּה"- חֻלִּין ז ע"ב, וְכֵן:"וְעַכְשָׁו גָּבַהּ הַר בֵּין הָעַרְבִים וּרְאוּבֵן שֶׁאֵינָם בְּשָׁלוֹם יַחַד, וּבֶן שִׁמְעוֹן תּוֹבֵעַ מְעוֹתָיו מִן הָעַרְבִים"- שׁוּ"ת הָרְמָ"א סִימָן פָּט, וְכֵן:"בְּעִירוֹ הָיוּ כָּל הַצְּעִירִים רְגִילִים לָבוֹא אֶצְלוֹ, וְכָאן בְּאֶרֶץ יִשְׂרָאֵל גָּבַהּ הַר בֵּינֵיהֶם לְבֵינוֹ"- עַגְנוֹן/ תְּמוֹל שִׁלְשׁוֹם,101, וְכֵן:"אוֹתוֹ לַיְלָה גָּבְהָה כְּעֵין מְחִצָּה בֵּינִי וּבֵין בְּרִיגִיטָה"- עַגְנוֹן/ עַד הֵנָּה, 31)