‘Aisha r.a. and the Prophet s.a.w. would use code language with each other denoting their love. She asked the Prophet s.a.w how he would describe his love for her. The Prophet Muhammad answered, saying: “Like a strong binding knot.” The more you tug, the stronger it gets, in other words.
Every so often ‘Aisha would playfully ask, “How is the knot?” The Prophet s.a.w would answer, “As strong as the first day (you asked).”