Appears 2 times in the Quran. (Root: شرك)
  1. And they set apart a portion for Allah out of what He has created of tilth and cattle, and say: This is for Allah-- so they assert-- and this for our associates; then what is for their associates, it reaches not to Allah, and whatever is (set apart) for Allah, it reaches to their associates; evil is that which they judge.

  2. And when those who associate (others with Allah) shall see their associate-gods, they shall say: Our Lord, these are our associate-gods on whom we called besides Thee. But they will give them back the reply: Most surely you are liars.