Likutei Moharan 46:1/ליקוטי מוהר"ן מ״ו:א׳

1Mechaat Kaf Bishat HaTefillah (Clapping during Prayer). This is an aspect of positioning the bed between north and south (Berakhot 5b). For a bed—i.e., an aspect of marital union—corresponds to prayer (Tikkuney Zohar #10). And north and south is an aspect of hands.

2This is what Abba Binyamin prayed: that his prayer be close to his bed—i.e., that there be no separation between prayer and union.