Kommentar zu Tehillim 105:8

the word He had commanded to the thousandth generation The Torah, which He commanded to make known in the world after a thousand generations, but He saw that the world could not exist without Torah, so he skipped 974 generations of them. It may also be interpreted according to its simple meaning: He remembered for Israel His covenant, which He commanded and promised to keep for them for a thousand generations, as the matter of (Deut. 7:9): “Who keeps the covenant and the kindness for those who love Him and who keep His commandments, to a thousand generations.”