“טוענת נא הושע ;בך ודבוקה חבוקה נא הושע” “עלך”
Harav Uri Landman, the Rav of Vishnovitz, explained that the two virtues of “chavukah udevukah” and “to’enes alach” are dependent on one another:
Regarding the passuk (Devarim 4:4): “V’atem hadveikim b’Hashem Elokeichem” upon which the expression “udevukah bach” here is based, the Baal Haturim writes that the tags on the letter ק in the word הדבקים allude to the recital of 100 brachos a day. He explains that when a person is strict to recite one hundred brachos according to halachah throughout the day, then he is always cleaving (davuk) to his Creator, and as the Rambam wrote (Hilchos Brachos 1 4): “We find that all the brachos are...in order to remember the Creator always and to fear Him.”
The sages of the Midrash (Bamidbar Rabbah 18:21) say that the takanah of 100 brachos was instituted by Dovid Hamelech, as alluded in the passuk (Shmuel II, 23:1): “V’eileh divrei Dovid ha’acharonim ne’um Dovid ben Yishai une’um hagever hukam al.” – על is numerically equivalent to 100. In light of this, we can explain that this is what he meant: “Hosha na chavukah udevukah bach” – by the fact that it is “to’enes alach” – strict to recite על brachos a day.
Ohr Yitzhar Yamim Nora’im Introduction p. 27
