יְהוָ֥ה שֹׁמְרֶ֑ךָ יְהוָ֥ה צִ֝לְּךָ֗ עַל־יַ֥ד יְמִינֶֽךָ׃
Yang Mahakekal adalah Penjagamu; Yang Mahakekal adalah naunganmu di sisi kananmu.
Rashi
סר צלם THEIR DEFENSE (lit., shade) IS DEPARTED [FROM THEM] — i.e. their shield and their strength is departed from them: the virtuous among them are dead; one of them was Job, who had protected them by his righteousness (Sotah 35a; cf. Bava Batra 15a). [Another explanation is: the shade (protection) of the Omnipresent is departed from them]. (Cf. Psalms 121:5).
Rabbeinu Bahya
Nachmanides explains the words: “their shadow has departed from them,” to mean that their shadow had been removed from their heads. He refers to a kabbalistic tradition that on the night of Hoshanah Rabbah, the 21st of Tishrey when the seal is attached to the fate of the individuals for the coming year, anyone whose shadow cannot be seen in the moonlight is slated to die during the course of that year. That calendar date corresponds to the 26th day after G’d commenced creating the universe. Calev meant to say that death had been decreed for these people already on the previous 21st of Tishrey. Although Calev did not spell this out in so many words, this is what he alluded to. This is also the allusion contained in Song of Songs 2,17: “until the day blows past and the shadows have fled.” Solomon meant that when a person’s “day,” i.e. his lifetime on earth, approaches its end this is signaled by his shadow departing from him first. This “shadow” comes closer to the Lord (the Ineffable Name י-ה-ו-ה whose numerical value is 26, corresponding to the 26th day after commencement of the creation). When David writes this “name” it also is described as ה' צלך, “the Lord is your shadow” (Psalms 121,5). Actually it would have been sufficient to refer to ונס הצל, “the shadow (sing.) departed, fled.” The reason Solomon spoke about צללים, “shadows” in the plural, is that every human being has two shadows (compare Yevamot 122). The regular shadow is the one visible when the sun shines. The “secondary” shadow is the one visible at night. [The Talmud distinguishes between the ability of demons to cast a shadow, suggesting that they can cast a shadow when impersonating persons by day, but cannot do so at night. Ed.]
Rabbeinu Bahya
It is also possible to interpret the words: “for they are our bread,” as a reference to the merit the Israelites possessed as evidenced by their fulfilling the commandment of eating matzah and dwelling in huts at the appropriate time. The word צל, would refer to the shade provided by the covering of the Sukkah. Whereas these people had forfeited the protection of their angels, we could count on the protection of the Lord by dint of having fulfilled the commandments of matzah on Passover and the dwelling in flimsy huts relying only on G’d’s shade to be our roofs. This thought has been paraphrased by David in Psalms 121,5 when he said: “the Lord is your guardian, the Lord is your protection at your right hand.” In view of these considerations, “you have no reason to fear them.”