Likutei Moharan 213:2/ליקוטי מוהר"ן רי״ג:ב׳

12. {“Atah seiter li (You are my shelter), mitzar (from adversity) You protect me” (Psalms 32:7) .} Know, too, that the aforementioned Name is SӔL, which derives from the initial letters of the verse (Psalms 32:7), “Atah Seiter Li .” And the mem of “Mitzar You protect me” is the aspect of the mem mentioned above, the aspect of the Samekh-Mem who prowls around the cover and the concealment in order to overpower the person, as explained above. And if, God forbid, he finds a place to rule, then he receives extra strength from this Name. For the mem is joined to the aforementioned Name SӔL, the combination forming his name, SaMӔL.

2Therefore, it is necessary to pause between the words Atah seiter li and the word mitzar, in order not to make the combination of his name, God forbid. For then, when he overpowers the person, God forbid, and receives extra strength from the Name, as explained above, the aforementioned Name becomes “Sof Adam Lamut (man’s destiny is to die)” (Berakhot 17a), the initial letters of which are the Name SӔL. However, when people protect themselves with the strength of that Name, then the Name is a cover and a concealment, the aspect of “Atah seiter li (You are my shelter)” and also “mitzar You protect me” and guard me.