This is a cable motif 52 rows high, that starts and ends with 19 stitches.

It assumes knowledge of basic cables, and uses the continuous-loop method as described by Techknitter. https://techknitting.blogspot.com/2022/10/infinity-loops-intro-new-trick-to.html

The test samples were knitted back and forth, but it should also work in the round. The yarn in the sample picture is Patons Classic Wool Worsted on US #6 needles.