Commentaire sur La Genèse 32:17

עדר עדר לבדו EVERY DROVE BY ITSELF — each species forming a drove by itself.

AND PUT A SPACE BETWEEN DROVE AND DROVE. I.e., in order to satisfy the covetous eye of that wicked man and to amaze him by the size of the gift. In Bereshith Rabbah⁴⁰75:13. the Rabbis express the opinion that there is an allusion to the future in this matter: “Jacob said before the Holy One, blessed be He, ‘O Master of the universe! If troubles will come upon my children, do not bring them one after another, but allow them intervals from their troubles.’” On the basis of this verse, the Rabbis thus hinted that the tributes and taxes which the children of Esau will collect from Jacob’s seed will have intervals and cessations between one another.

וריוח תשימו, a device to make each gift appear as a sign of Yaakov’s respect. When someone receives a number of gifts at intervals he appreciates them all the more.