신명기 8:10의 주석

AND THOU SHALT EAT AND BE SATISFIED, AND BLESS THE ETERNAL THY G-D FOR THE GOOD LAND. He is stating that when you remember the bondage in Egypt and the affliction in the wilderness, and you will eat and be satisfied in the good Land, you will bless G-d for it. And our Rabbis have received by tradition that this is a positive commandment,⁹⁰Berachoth 21a. See “The Commandments,” Vol. I, pp. 26-27. its meaning thus being, “and you shall bless the Eternal your G-d.” Similarly, then thou shalt make a parapet for thy roof;⁹¹Further, 22:8. and thou shalt keep the Passover;⁹²Ibid., 16:1. and thou shalt take of the first of all the fruit of the ground,⁹³Ibid., 26:2. and so also many similar verses [which appear to be mere optional, but are, nevertheless, interpreted as positive commandments]. The meaning of the expression for the good Land is “and for the good Land;” that is, He commands that you are to bless Him at all times for the food you eat to satisfaction, and for the Land that He gave you in order that you might have it forever as an inheritance and be satisfied with its goodness. Thus the obligatory nature of this commandment is in all places [i.e., even outside of the Land of Israel, since the commandment to bless Him for the food we eat is independent of the duty to bless Him for the Land He has given us].

וברכת את ה' אלוקיך, the reason why the Lord blesses you in such a fashion is so that you will remember that only from Him could you have been given a land with such an abundance of advantages.

ואכלת ושבעת וברכת, “you will eat, be sated, and bless the Lord.” This is the verse from which we derive the positive commandment to bless Hashem.