Chinese Waves Dishcloth
Pattern is available as a pdf here.
From pattern description:
“This pattern makes a nubby dishcloth, thicker and more stable than plain garter stitch. Chinese Waves is one of my favorite pattern stitches. I use it for edgings and for textured stripes interspersed with stockinette. I like it so much, it’s actually pictured in the left border throughout my web site.”