Quoted in Shirali, Aresh (10 August 2017).  "The Enigma of Aligarh" https://openthemagazine.com/freedom-issue-2017/freedom-issue-2017-dispatches-from-history/the-enigma-of-aligarh/. Open Magazine. 
Variant: "India is like a bride which has got two beautiful and lustrous eyes—Hindus and Mussulmans. If they quarrel against each other that beautiful bride will become ugly and if one destroys the other, she will lose one eye."  Writings and Speeches of Sir Syed Ahmad Khan https://books.google.com/books?id=ausHAAAAMAAJ, p. 160.
                                    
Syed Ahmed Khan: Eye
Syed Ahmed Khan was Indian educator and politician. Explore interesting quotes on eye.
                                        
                                        M.R.A. Baig, The Muslim Dilemma in India, Delhi, 1974, p. 52. 
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                                        Azhar Mohammed  New Age Islam http://www.newageislam.com/NewAgeIslamIslamicPersonalities_1.aspx?ArticleID=1955 
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                                         Writings and Speeches of Sir Syed Ahmad Khan https://www.google.com/books/edition/Writings_and_Speeches/ausHAAAAMAAJ?hl=en, Nachiketa Publications (1972), p. 160. 
Variant: "India is a beautiful bride and Hindus and Muslims are her two eyes. If one of them is lost, this beautiful bride will become ugly." Quoted in Shirali, Aresh (10 August 2017).  "The Enigma of Aligarh" https://openthemagazine.com/freedom-issue-2017/freedom-issue-2017-dispatches-from-history/the-enigma-of-aligarh/. Open Magazine.