Book III. Compare: Parcere subjectis et debellare superbos. ("Spare the conquered, battle down the proud.") Virgil, Aeneid (19 BC), Book VI, line 853 (tr. Robert Fitzgerald). 
The Poems of Ossian, Fingal, an ancient Epic Poem
                                    
“Why should Ossian sing of battles? For never more shall my steel shine in war. I remember the days of my youth with grief; when I feel the weakness of my arm. Happy are they who fell in their youth, in the midst of their renown! They have not beheld the tombs of their friends, or failed to bend the bow of their strength.”
            "The War of Caros" 
The Poems of Ossian
        
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James Macpherson 46
Scottish writer, poet, translator, and politician 1736–1796Related quotes
                                
                                    “In my days of youth, I remembered my God,
And he hath not forgotten my age.”
                                
                                
                                
                                
                            
The Old Man's Comforts and How He Gained Them, st. 6.
From Monteux, Doris G (1965). It's All in the Music: The Life and Work of Pierre Monteux. New York: Farrar, Straus and Giroux. OCLC 604146,, p. 198
“I knew a phoenix in my youth, so let them have their day.”
                                        
                                         His Phoenix http://poetry.poetryx.com/poems/1510/, refrain 
The Wild Swans at Coole (1919)
                                    
Exclusive Interview With “Super 8” And “The Kissing Booth” Star Joel Courtney https://daman.co.id/exclusive-interview-with-super-8-and-the-kissing-booth-star-joel-courtney/ (June 6, 2011)
On a Boy's first Reading of "King Henry V", reported in Bartlett's Familiar Quotations, 10th ed. (1919); comparable to "I am the master of my fate", William Ernest Henley, Invictus (1875).
“I never saw a more dreadful battle in my born days.”
Source: Don Quixote de la Mancha (1605–1615), Part I, Book IV, Ch. 8.
                                        
                                        "The Retreat," l. 1. 
Silex Scintillans (1655)
                                    
The Kasîdah of Hâjî Abdû El-Yezdî (1870)