a. And unto The God falls in prostration whoever is in the heavens & the earth, willingly or unwillingly, so do their shadows in the mornings in the afternoons. (13:15)
b. Have they not observed things that The God has Created, (how) their shadows incline to the right & to the left, making prostration unto The God, & they are lowly? (16:48) The Holy Quran
when we worship, our shadows worship.