Row 5 and 13: Sl 1 pwise, k3, p2, k3, p2, slip next 2 sts to cable ndl and hold in back, k2, knit 2 sts from cable ndl, p2, k4, p2, k4, p3, slip next 3 sts to cable ndl and hold in back, k3, knit 3 sts from cable ndl, p3, k4, p2, k4, p2, k3.
Row 9: S 1 pwise, k3, p2, k3, p2, slip next 2 sts to cable ndl and hold in back, k2, k2 sts from cable ndl, p2, k4, p2, k4, p3, k6, p3, k4, p2, k4, p2, k3.
Once through the pattern it's easy to follow. You knit p sts on p sts and k sts on k sts and keep track of the rows to place the cable on the right row. Knit until out of yarn, the scarf measures approx 140cm (55''). Bind off on row 3.