פרשת כי תבוא תש"ז - מקרא ביכורים

ארמי אבד אבי A SYRIAN DESTROYED MY FATHER — He mentions the loving kindness of the Omnipresent saying, ארמי אבד אבי, a Syrian destroyed my father, which means: “Laban wished to exterminate the whole nation” (cf. the Haggadah for Passover) when he pursued Jacob. Because he intended to do it the Omnipresent accounted it unto him as though he had actually done it (and therefore the expression אבד which refers to the past is used), for as far as the nations of the world are concerned the Holy One, blessed be He, accounts unto them intention as an actual deed (cf. Sifrei Devarim 301:3; Onkelos).

And thou shalt rejoice in all the good which the LORD thy God hath given unto thee, and unto thy house, thou, and the Levite, and the stranger that is in the midst of thee.

ושמחת בכל הטוב AND THOU SHALT REJOICE IN EVERY GOOD THING — From this they (the Rabbis) derived the law that the recital on the occasion of bringing the first fruits is made only during the joyful period of the year — from Pentecost till the Feast of Tabernacles — when a man is gathering in his grain, his fruits, his wine and his oil; but from Tabernacles onwards until Chanucah if he brings these, he does not make the recital (Pesachim 36b).