Why is 右助 (yòu zhù) in this Chinese translation of Qur'an 1:5: 我们只崇拜你，只求你右助?
According to dictionaries like this one (definition 7), in ancient Chinese, 右 and 佑 in this usage are interchangeable. 


  
  古同“佑”，帮助，偏袒。
  


In modern simplified Chinese system, we use 佑 for this usage. 

But not sure if this is the case in other regions where traditional characters are still in use.