Likutei Moharan, Part II 59:2/ליקוטי מוהר"ן·תנינא נ״ט:ב׳

12. An example of the element between the mitzvot is: “And God spoke to Moshe, saying: ‘You shall make.’” Now, there is surely a devotional practice in these words as well, in that they precede the mitzvah. For the core of the mitzvah itself is stated afterwards in the Torah, following the words “you shall make.” Yet, it is certainly true that the aforementioned verses between one mitzvah and the next also contain devotional practice. This is the aforementioned element, that which is between mitzvah and mitzvah.

2There is more to this. See elsewhere (Likutey Moharan I, 22:9) regarding this subject, that there is actually devotional practice also in the verse “And [God] spoke….”