בראשית מג:כה פירוש: רש״י, רשב״ם, רד״ק וחזקוני

ויכינו means AND THEY MADE READY — they laid it out ornately in fine vessels.

ויכינו את המנחה, while the produce had been wrapped in the sacks on the way, it had suffered somewhat, and the brothers now tried to restore these items to the appearance of freshness.

ויכינו, they arranged the gifts they had brought in a manner that would look appropriately impressive by the time Joseph would come home.