Genesis 33:3

And he passed over before them, and bowed himself to the ground seven times, until he came near to his brother.

He ... bowed himself ... seven times. The manner of doing this is by looking toward a superior and bowing with the upper part of the body brought parallel to the ground, then advancing a few steps and bowing again, and repeating this obeisance until, at the seventh time, the suppliant stands in the immediate presence of his superior.