Rashi on Genesis 37:26/רש"י על בראשית ל״ז:כ״ו

1מה בצע means WHAT PROFIT— just as the Targum renders it.

2וכסינו את דמו AND CONCEAL HIS BLOOD — this signifies and we hide the fact of his death (for they had not shed his blood, but had cast him into a pit to die).