Not having a single knot on the bride and the groom is an Orthodox Judaism custom.
Do you know: This custom is emphasized more for the groom than the bride at the wedding.
In the Lubavitch Hassidic sect of Judaism, the groom must arrive at his wedding without a knot on his body. Before the Chuppah or Wedding ceremony that takes place under a canopy, the groom must untie all the knots of his garment. This means that he has to untie his shoelaces, tie, belt and any other piece of clothing that may have a knot. This is done because according to the custom, knots not only symbolize troubles in a marriage but also mean that all other bonds are eliminated, except the bride and groom’s intimate bond.