Commentaries:
This episode occurs when Abraham sends his most trusted servant to find a wife for Isaac. This story of eating stands in sharp contrast to Esau's satiation of his hunger, as Abraham's servant will allow nothing—not even good food, convivial hospitality, and the persistent appeal of Rebekah's relatives—to deter him from completing his mission. The servant's priorities are firm: His master's delegated responsibility came first!
Of course, so are Jesus' priorities when Satan tempted Him through food, as recorded in Matthew 4 and Luke 4. Somewhat later in His ministry, after His conversation with the woman at the well (John 4), the disciples want Him to eat. He replies that His food is to finish the work His Father gave Him to do (verse 34). He asserts, like Abraham's faithful servant, that sacrifice is in order because His immediate need to gratify His hunger was comparatively unimportant.
John W. Ritenbaugh
Eating: How Good It Is! (Part Two)