From among the Signs of Allah

Here Allah reminds His Creation of His power, and that He is the One Who has no equal, and He is Able to do all things. Allah's saying;

وَمِنْ ءَايَـتِهِ الَّيْلُ وَالنَّهَارُ وَالشَّمْسُ وَالْقَمَرُ

It is Not permissible to prostrate before anyone except Allah Almighty

لَا تَسْجُدُوا لِلشَّمْسِ وَلَا لِلْقَمَرِ‌ وَاسْجُدُوا لِلَّـهِ الَّذِي خَلَقَهُنَّ (Do not make sajdah [ prostration ] to the sun, or to the moon. And make sajdah to Allah who has created them - 37). It is learnt from this verse that prostration is the right of the Creator of the Universe only. The consensus of the Ummah is that to prostrate before any star, human being, etc. is haram (forbidden), whether it is for worship, or just as a gesture of respect and reverence. The only difference is that if someone prostrates before anyone other than Allah with intention to worship him, he becomes an infidel and the one who prostrates simply as a mark of respect and reverence is not called an infidel, but he is guilty of committing a serious haram act and is a sinner.