Sloth:  Physical or mental inactivity; disinclination to action, exertion, or labour; sluggishness, idleness, indolence, laziness.
            Examples:
1575-85 Sandys Serm. xvii. 298 To withdraw men..from sloth.

     1606 Dekker Seven Deadly Sins Wks. (Grosart) II. 50 This nastie, and loathsome sin of Sloth.

     1648 Wilkins Math. Magick i. ii. 8 These arts..admit not either of sloth or wearinesse.

     1700 Rowe Amb. Step-Moth. i. i, Sloth and folly Shiver and shrink at sight of toil and hazard.

     1790 Burke Fr. Rev. 247 The same lazy but restless disposition, which loves sloth and hates quiet.

Sloth as it is perceived in The Farie Queene:
    Idleness or Sloth followed Pride (Duessa) on to the sceene.  Idleness choose to ride on a "slothfull" (stanza 18 book 1) or lazy ass.  He is dressed in all black and resembles a monk.  He loved to sleep and that is what he did most of the day.  He could bearly lift up his heavy head.  He led the rest of the deadly sins which is weird considering he could not lift his head to see if he and they were going the right way.