ואמרת אליו הגדתי היום לד' אלקיך כי באתי אל הארץ אשר נשבע ד' לאבתינו לתת לנו
The landowner brings his fruits to Yerushalayim, to the Kohen, and makes his declaration acknowledging that whatever material bounty he has been fortunate to attain is due solely to Hashem’s beneficence. Thus, concerning the words, “And you shall say to him,” Rashi comments, “To show that you are not unappreciative.” The Sifri explains the need to direct this declaration to the Kohen, for it is only by acknowledging to another that Hashem has fulfilled His promise that one expresses his gratitude. Furthermore, as noted by the Bais Yisrael, zl, the pasuk begins, V’amarta, “You shall say” and follows in pasuk…