Figure 8 loop

It is used in climbing and caving where rope strains are light to moderate and for decorative purposes.
The double figure eight is used to put a loop in the end of a rope, or around an object. It is relatively easy to tie and is secure, but can become difficult to untie after heavy loading, and can jam badly in any rope type.

https://www.animatedknots.com/figure-8-follow-through-loop-knot