Yusuf al-Bahrani in Hadaiq an-Nadera said about shia shaykh Saduq:

While he was discussing report he said:

والظاهر أن هذا التفسير من كلام الصدوق ، الذي يدخله غالبا في الأخبار

Translation:

And apparently this commentary from the words of Saduq, WHICH HE OFTEN INSERTS IN THE REPORTS.

Saduq was one of the main figures in shia religion, and he is one of their greatest hadith scholars. So as you see Yusuf Bahrani testifies that this great shia muhadith OFTEN inserted in the reports his own comments.

Originally posted: http://www.dd-sunnah.net/forum/showthread.php?t=147327