"He has never said any such thing! Where do you get this shit?"
I don't suppose you intend either to withdraw this or apologise for the accusation but the quote came from here (too large to blue clickie, I suspect
https://books.google.ie/books?id=ltg-UV-ddDgC&pg=PA152&lpg=PA152&dq=Benny+Morris,+in+Israel%27s+Secret+Wars,+stated+that+Israeli+forces+provided+the+bulldozers+used+to+bury+the+massacred+Palestinians.&source=bl&ots=w1gPnpm1Rn&sig=vKmNVuVFUapjMbsLLJqVNu4ReUo&hl=en&sa=X&ved=0ahUKEwiNkYGLxpHPAhXJAcAKHfZdBa4Q6AEIGzAA#v=onepage&q=Benny%20Morris%2C%20in%20Israel's%20Secret%20Wars%2C%20stated%20that%20Israeli%20forces%20provided%20the%20bulldozers%20used%20to%20bury%20the%20massacred%20Palestinians.&f=false
The informantion is repeated here - alos too large to clickie - that qoote was
https://books.google.ie/books?id=-wwPNjSnxcYC&pg=PA644&lpg=PA644&dq=Benny+Morris+on+Sabra+Bulldozers&source=bl&ots=rqSBTI6geU&sig=VF7jO3o35b0b-HB1i9ggsDucIxY&hl=en&sa=X&ved=0ahUKEwjw79KGxZHPAhWFLsAKHUh8AVYQ6AEIGzAA#v=onepage&q=Benny%20Morris%20on%20Sabra%20Bulldozers&f=false

And here
Benny Morris, in Israel's Secret Wars, stated that Israeli forces provided the bulldozers used to bury the massacred Palestinians.