Likutei Moharan 44:5/ליקוטי מוהר"ן מ״ד:ה׳

15. {“Today you are standing, all of you, before God your Lord—your leaders, your tribal heads, [your elders and your law enforcers, all the men of Israel, your children, your women, and the proselytes in your camp; even your woodcutters and water drawers]” (Deuteronomy 29:9) . } Today you are standing — “Standing” is nothing other than prayer (Berakhot 6b).

2before God your Lord — This corresponds to the Land of Israel, as our Sages taught: Whoever lives in the Land of Israel is <like> one who has a God (Ketuvot 110b). In other words, how will you merit having your prayers be in the air of the Land of Israel?

3your leaders, your tribal heads… — [Scripture] lists ten aspects—i.e., the aspect of clapping. As explained, by clapping the prayer is in the air of the Land of Israel.