Isaïe 64:10 Halakha : Shulchan Arukh, Orach Chayim

בֵּ֧ית קָדְשֵׁ֣נוּ וְתִפְאַרְתֵּ֗נוּ אֲשֶׁ֤ר הִֽלְל֙וּךָ֙ אֲבֹתֵ֔ינוּ הָיָ֖ה לִשְׂרֵ֣פַת אֵ֑שׁ וְכָל־מַחֲמַדֵּ֖ינוּ הָיָ֥ה לְחָרְבָּֽה׃

Notre saint et glorieux temple, où te célébraient nos ancêtres, est devenu la proie des flammes; nos biens les plus chers ont été livrés à la destruction.

Shulchan Arukh, Orach Chayim

2. One who sees Jerusalem in her destruction, says "Tzion is a desert, a desolation" (Isaiah 64:9) and rends (one's garments). And when one see the Bais HaMikdash says "Our holy Temple, our pride, Where our fathers praised You, Has been consumed by fire: And all that was dear to us is ruined." (Isaiah 64:10). And from where is one obligated to rend - from HaTzofim. And afterwards when he sees the the Mikdash, he rends another tearing. And all rendings are a tefach (handbreath). If one comes from the way of the desert that then he sees the Mikdash first. He rends on the Mikdash a tefach, and afterwards when he sees Jerusalem, he adds to the first rending a little bit.