Chasidut zu Wajikra 21:7

Another of aspect of the significance of the tone sign ‎‎shalshelet above the word ‎וימאן‎, can be understood from ‎‎Rashi’s comment on Leviticus 19,2 where the Torah ‎commands us to strive and be holy. He writes that wherever the ‎subject of illicit sexual relations in the Torah is mentioned, the ‎subject of holiness is found nearby. Rashi quotes three ‎examples, (Leviticus 21,7;21,15, and 21,6). The Jewish people ‎‎(when at their best) have been “crowned” with two levels of ‎holiness, something that is spelled out in a liturgical poem recited ‎on the first day of Rosh Hashanah immediately before we ‎recite the “kedushah,” where the author says that two of ‎these levels of holiness have been granted to the Jewish people, ‎i.e. ‎מידו נתן שתי קדושות‎, whereas He, G’d is garbed in an additional ‎level of holiness, i.e. ‎ויקדש באחת משלוש קדושות‎.‎