Page 147 - Patrick Moreau-Marine "Knots How to Tie 40 Essential Knots"

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Whipping with a Blood Knot

If you want to stop the end of a rope quickly without doing a long whipping, you
can use the excellent holding capacities of the blood knot.
But you cannot make more than seven turns: beyond that, the strands end up
overlapping, which prevents a tight closure.

1 - Start by creating a half knot with the rope to be whipped, while wrapping it around the rope whose end
you want to cover.