Responsa for Psalms 105:8

זָכַ֣ר לְעוֹלָ֣ם בְּרִית֑וֹ דָּבָ֥ר צִ֝וָּ֗ה לְאֶ֣לֶף דּֽוֹר׃

He hath remembered His covenant for ever, The word which He commanded to a thousand generations;