הָפַ֣כְתָּ מִסְפְּדִי֮ לְמָח֪וֹל לִ֥י פִּתַּ֥חְתָּ שַׂקִּ֑י וַֽתְּאַזְּרֵ֥נִי שִׂמְחָֽה׃
주께서 나의 슬픔을 변하여 춤이 되게 하시며 나의 베옷을 벗기고 기쁨으로 띠 띠우셨나이다
Kitzur Shulchan Arukh
After the body is laid in the grave, the bier is turned over three times, for the numerical value of the word mittah (bed, bier) is the same as that of the word Din (judgement). This is an omen that the judgement will be turned into mercy, and the mourning into joy. The verse alludes to this, "You turned my mourning into dancing."5Psalms 30:12. On a day when Tachanun is not said, this is not done.