Some people have validated the term 'u'budiyat alShayh'. Of course this is then interpreted as obedience to the shaykh. And it is also analysed on the term 'Abd alNabi'. In reality 'abd' and 'ubudiya' convey two very different meanings. The term 'ubudiya' cannot be used for a shayh according to Shaykh Abdul Hadi Kharsa who states it is 'shirk qawli' and the one who uses this term must repent. http://abdalhadialkharsa.com/index.php?act=viewOps&id=2168