Bengali Wikisource Search result, retrun from Commons image, not from Local. 

Here is below link of search result....
https://bn.wikisource.org/w/index.php?search=intitle%3AReligion&title=Special:Search&profile=advanced&fulltext=1&ns6=1&searchToken=6awbgihj0673wlyxxhy6qu32z

There are many local PDF/djvu files with word of intitle:Religion, but no result found.

Regards,

Jayanta Nath