If, then, the courts are to regard the constitution, and the constitution is superior to any ordinary act of the legislature, the constitution, and not such ordinary act, must govern the case to which they both apply.”744 To declare otherwise, Chief Justice Marshall said, would be to permit the legislature to “pass[ ] at pleasure” the limits imposed on its powers by the Constitution.

https://www.law.cornell.edu/constitution-conan/article-3/section-2/clause-1/marbury-v-madison