Likutei Moharan 277:3/ליקוטי מוהר"ן ער״ז:ג׳

13. All cures, too, come from the earth. Therefore, when the earth gives forth its yield, instilling strength in all the trees and plants—i.e., at the time of ripening, during the month of Iyyar—then all the cures have greater potency, for that is when the earth suffuses them with strength. At others times, however, even if one were to take those very same cures, they would not have this potency. This is the reason we take cures during the month of Iyyar, which is May.

2Foremost is the Land of Israel, for all the lands receive from the residue of the Land of Israel (Taanit 10a). And the Land of Israel has two aspects: there are times when it is called “the Land of Kanaan,” and other times when it is called simply “the Land.”

3That is, when there is dispute, it is called “the Land of Kanaan,” the aspect of kan ani; as our Sages, of blessed memory, commented concerning the verse (Zechariah 14:21) “there will not be KaNaANI”—there will not be KaN ANI (a poor person here) (Pesachim 50a). Thus it is that Kanaan is the aspect of “a poor person here.” This is caused by dispute, for one dispute thwarts one hundred livelihoods.

4This is also the aspect of “There was quarreling between Avram’s herdsmen and Lot’s herdsmen, and the Kanaani were then in the land” (Genesis 13:7). As a result of the quarreling and dispute, “the kanaani …,” for it is then called the aspect of the Land of Kanaan, as explained above.

5However, when there is peace, it is called simply “the Land.” Then, it is the aspect of “the Land will give forth its yield” (Psalms 67:7)—it gives its strength to all the earth’s yield, and so all the cures are potent, as explained above.

6Therefore, the letters IYYaR are an acronym of “Oyevai Yashuvu Yeivoshu Raga (My enemies will turn back and be instantly shamed)” (Psalms 6:11). For that is when there are all the cures, which are the aspect of peace, the aspect of “the Land will give forth its yield,” as explained above. This is the opposite of dispute, which is the aspect of the Land of Kanaan, as explained above.