Frum Yidden trust in Hashem

 

Parshas Hashavua שופטים תמים תהיה עם ה' אלהיך דברים יח:יג Only for those who don't trust in Hashem The Sefer שלחן העזר quotes the ספר המטעמים*  "חתן & כלה before walking down to the חופה untie all the knots they are wearing.  The reason for doing so is to prevent from כשפים (witchcraft) which might put a spell on the couple and prevent them from having relations." (Based on a תרגום המיוחס ליונתן) The above is not a Minhag but a Segula people adopted to prevent witchcraft from harming them. The יראים & תמימים (who fear & trust Hashem) rely on  תמים תהי' עם ה' אלוקך & שומר מצוה לא ידע דבר רע (Don't bother unknotting)"   *Probably, the first written source of this Minhag/Segulah