Tractate Pirkei Avot - Chapter 6 - Mishnah 11

Whatever the Holy Blessed One created in His world, he created only for His glory, as it is said: “All who are linked to My name, whom I have created, formed and made for My glory” (Isaiah 43:7), And it says: “The Lord shall reign for ever and ever” (Exodus 15:18).

Said Rabbi Hananiah ben Akashya: It pleased the Holy Blessed One to grant merit to Israel, that is why He gave them Torah and commandments in abundance, as it is said, “The Lord was pleased for His righteousness, to make Torah great and glorious” (Isaiah 42:21).