This knot known lark’s head,

it is commonly used to fasten a rope to an object.

https://t.co/vhTDFcVcZ8 https://video.twimg.com/ext_tw_video/1828459373376491520/pu/vid/avc1/720x964/1Lc3BRemf8J0Dg3q.mp4?tag=12