קָצַ֣פְתִּי עַל־עַמִּ֗י חִלַּ֙לְתִּי֙ נַחֲלָתִ֔י וָאֶתְּנֵ֖ם בְּיָדֵ֑ךְ לֹא־שַׂ֤מְתְּ לָהֶם֙ רַחֲמִ֔ים עַל־זָקֵ֕ן הִכְבַּ֥דְתְּ עֻלֵּ֖ךְ מְאֹֽד׃
Я был разгневан на Моих людей, Я осквернил Моё наследство И отдал их в твою руку; Ты не пощадил их; На престарелых ты тяжело положил свое иго.
Rashi
on the aged you made your yoke very heavy On the aged, who were unable to bear hard work, you made heavy your yoke.
Ibn Ezra
I was wroth, etc. When I was angry with my people, thou didst not show mercy to them, etc.
Ibn Ezra
The ancient is especially mentioned because of the failure of his strength and because of the regard due to him.