Never heard of it, are you perhaps thinking of "hand fasting"which is sometimes used within a religious marriage ceremony today , but has a very much more ancient pedigree, it involves the hands of the couple being "tied" with a ribbon, cloth or rope when vows to each are given, and when the knots are untied the couple are bound together, perhaps the origin of "tying the knot"
In some parts of of the world tartan is used , but the actual type of cloth is not so important as the tying together of the couple.