Yea, as yee loue your ovvne life, peace, vvelfare; Rouze vp your ſpirits, avvaken your Chriſtian courage, and ſet your ſelues heartily againſt the traitorly ſinnes of theſe times, vvhich threaten the bane of all theſe. Cleanſe yee theſe Augean ſtables of our drunken Tauernes, of our profane ſtages, and of thoſe blinde Vaults of profeſſed filthineſſe, VVhoſe ſteppes goe dovvne to the chambers of Death; yea, to the deepe of Hell.1613 April 3 (Gregorian calendar), Jos[eph] Hall, “An Holy Panegyrick. A Sermon Preached at Paules-Crosse, vpon the Anniuersary Solemnity of the Happie Inauguration of Our Drad Soueraigne Lord, King Iames, March 24. 1613.”, in A Recollection of Such Treatises as Haue Bene heretofore Seuerally Published and are Nowe Reuised, Corrected, Augmented. […], London: […] [Humfrey Lownes] for Arthur Iohnson, Samuel Macham and Laurence Lisle, published 1615, →OCLC, page 711:
traitorly
adv
Etymology From Middle English trayterly, traytourliche, equivalent to traitor + -ly.
But wete ye wel whan ye are past this lodgynge / I shalle hurte you and I may / for ye slewe my fader traitourly / But fyrst for the loue of my lord sir Tor / and for the loue of sir Lamorak the honourable Knyght that here is lodged ye shal haue none ylle lodgynge / For hit is pyte that euer ye shold be in the company of good Knyghtes1485, Sir Thomas Malory, chapter IX, in Le Morte Darthur, book X: