Moses may have been asking God to bless Israel with rejoicing that corresponded to, or lasted as long as, their days of affliction and the years during which they suffered calamity.
(‏ مزمور ٩٠ :‏ ​ ١٥ ،‏ ١٦‏ )‏ ربما كان موسى يطلب من الله ان يجعل فرح اسرائيل يدوم بقدر ما دامت ايام اذلالهم وسنين الشر الذي عانوه .‏