Islamic concepts

Bidʿah (@bdEp@) — religious invention, invented practice

made-up ritual, religious invention, addition, new practice that has no basis in the Qurʾān or Sunnah, cultural superstition added into Islam, invented ritual

incompatible addition to religion

In the sphere of religion, with regards to worshipping Allāh (swt), Muḥammad ﷺ taught us everything we need to know.

http://www.youtube.com/watch?v=BA92oxF9Bm8

“whoever introduces something into this religious matter of ours, Allah will reject it.” Bukhari

if you do it to brig you closer to Allāh (swt), that's religious.

6:159