The Fitzwilliam Museum, ms. 169,
fol. 48v, 1301-1400.

(according to Ernest Langlois the date is either the very end of the XIVth or the beginning of the XVth century)

Detailed Manuscript Information (based on The Fitzwilliam Museum and Ernest Langlois, Les manuscrits du Roman de la rose. Description et classement, Geneva : Slatkine Reprints, 1974, p. 150-151) :

Parchment, measure: 329x233mm, 137 folios, two rubrics at 39 lines. Beginning of the second folio: De mon lit tantost me levay.