חסידות אויף שמות 26:17

"Two tenons (hands) to each plank" (Ex. 26:17) as it is found in the Gemara: "happy is the one that comes here and their learning is in their hand" (Pesachim 50a). And it appears to me that it is also written in the Gemara "greater is study, for it brings to action" (Kiddushin 40b). And in this world, when we see a person learning, we cannot understand if their Torah is good enough to bring about that person to action, and the essence of most deeds is done with one's hand, and this is "happy is the one that comes here and their learning is in their hand" - that is, their study brought them to action.

And according to this we explain "two hands for each plank" (Ex. 26:17): behold, the human being was created with two hands, right and left, so as to make explicit for the human being the choice of going to the right or to left, to serve with the two impulses, and to put the left under the right. And this is what is written "two hands for each plank", meaning one trait that you want to strengthen in yourself or that you want to cut off from yourself, see that you strengthen that also with your left hand, and to serve with both impulses. "Connected, a woman to her sister" this is to be understood through what is said in the Text "even one's enemies will make peace" and there will be peace, just as a "woman and her sister".