Genesis 2:3

ויברך … ויקדש AND GOD BLESSED … AND HE SANCTIFIED — He blessed it through the Manna, that on all other days of the week there should fall for them (the Israelites) an Omer for each person, whereas on the sixth day there should fall twice as much of that bread. So, too, He sanctified it through the Manna, that it should not fall at all on the Sabbath (Genesis Rabbah 11:2). This verse is written here with reference to what would happen in the future. אשר ברא אלהים לעשות WHICH GOD IN CREATING HAD MADE — The work which should have been done on the Sabbath He did in the double work which He executed on the sixth day, as it is explained in Genesis Rabbah 11:9.

וַיְבָ֤רֶךְ אֱלֹהִים֙ אֶת־י֣וֹם הַשְּׁבִיעִ֔י וַיְקַדֵּ֖שׁ אֹת֑וֹ כִּ֣י ב֤וֹ שָׁבַת֙ מִכׇּל־מְלַאכְתּ֔וֹ אֲשֶׁר־בָּרָ֥א אֱלֹהִ֖ים לַעֲשֽׂוֹת׃ {פ}

And God blessed the seventh day, and sanctified it: because in it He rested from all his work which God had created and performed.