I had to search forever to find this! The sailors/lovers/fishermen's knot ceremony wording. You see the picture of them tying it all over Pinterest but no wording for the ceremony! We did this for our beach wedding and even our coordinator loved it so much she kept it to use!
Tie a "Fisherman's Knot" instead of unity candles....“true lovers knot” is the strongest there is; it will not break, and will only become stronger when under pressure. Although the fisherman's knot is one of the simplest knots to tie, it is also one of the strongest. The rope itself will break before the knot will."