DEVINCTION (Devinctio), in antiquity, was used to signify a love charm or incantation to gain the affection of a person beloved.
It was done by tying knots; and is thus described by Virgil in his eighth Eclogue:
Nelle tribus nodis ternos, Amaryllis, colores:
Nelle, Amaryllis, modo; et Veneris, die, vincula nullo.