I Samuele 25:9 Kabbalah: Avodat HaKodesh (Ibn Gabbai)

And their saying "[If] you listen with the old, you will listen with the new," is to hint that this listening needs to be without pause. For there is no pause or end to the Unification and the listening Above. So the complete servant must constantly seek that listening, and hear. And that is [the meaning of] their saying, "[If] you listen with the old," and if you do it, "you will listen with the new" - you will revitalize the listening and the connection to the Above. And for this, the path and the great refinement are the Torah and the commandments, which have no pause ever. So one should not separate from them even for an instant, to illustrate that which they resemble Above. And about this is it said, "And you shall meditate upon them day and night." For the Spring of the Unification constantly flows and moves and never ceases. And to point to all this, they said at the end of Berakhot and the end of Moed Katan, "Torah scholars have rest (menuchah) neither in this world nor in the world to come, as it is stated (Psalms 84:8), 'They go from strength to strength, every one of them appears before God in Zion.'" And the explanation of rest [here] is pause and cessation, as in, "David’s young men went and spoke to Naval, etc. in David's name, and they rested (vayanuchu)" (I Samuel 25:9). And Yonatan translated it [as], "and they ceased." And the idea is that true Torah scholars occupy themselves with Torah, which is the building of the world - and that is why they are called builders, as it is found in the chapter [entitled] Elu HaKoshrim - and they perpetuate the Unification with this building. This indicates that it does not pause, and that is why they do not have rest, pause or cessation from the Torah, which is the greatest cause of the Unification, neither in this world nor in the world to come. And it is like the matter that they said about Yehudah in the first chapter of Sotah (7b:11) and [Bava] Kamma (92a:23) at the end of the chapter [entitled] HaChovel, "He did not know how to deliberate with the sages. [So Moshe] said, 'May his hands fight on his behalf' (Deuteronomy 33:7)."