Rashi on Numbers 13:26/רש"י על במדבר י״ג:כ״ו

1וילכו ויבאו AND THEY WENT AND CAME [TO MOSES] — What is the force of “they went” (we have been informed that they had returned; why afterwards make any reference to their going on the journey)? It is intended to compare their “going” with their “coming" to Moses! How was their coming to Moses? With an evil plan! So, too, was their “going” on the journey with an evil plan (i.e. that when they were travelling they had already resolved to bring back an evil report)! (Sotah 35a).

2וישיבו אתם דבר AND THEY BROUGHT BACK WORD UNTO THEM — unto Moses and Aaron (for the Congregation is mentioned separately).