Genesis 23:7 (NIV)
Then Abraham rose and bowed down [shachah] before the people of the land, the Hittites.
Genesis 33:3 (NIV)
He himself [Jacob] went on ahead and bowed down [shachah] to the ground seven times as he approached his brother [Esau].
Genesis 42:6 (NIV)
Now Joseph was the governor of the land, the one who sold grain to all its people. So when Josephs brothers arrived, they bowed down [shachah] to him with their faces to the ground.
Matthew 18:26(NIV)
The servant fell on his knees [proskuneo] before him. Be patient with me, he begged, and I will pay back everything.
It can be used as a posture in worship, not all bowing is worship. I dare you say i worship Mary when i bow down and venerate Her image. I don't even know why i answer you Iollain. We've been over this before and you are already set in your personal beliefs and seems nothing can change your mind.
Oh well.