Or HaChaim on Numbers 17:26/אור החיים על במדבר י״ז:כ״ו

1 ויעש משה כאשר צוה השם כן עשה, Moses did as G'd commanded, so he did. The reason that the Torah repeated the same statement twice may be as follows: The first statement indicates that Moses carried out G'd's instructions immediately; the second statement כן עשה refers to his replacing the rod of Aaron in the Sanctuary. The word כאשר therefore refers to both actions.