a-throng--prophetes.ai

a-throng, advb. phr.
  (əˈθrɒŋ)
  [a prep.¹ + throng.]
  In a throng; thronged, crowded.

c 1300 K. Alis. 3409 Alle weore dryven athrang. 1881 Palgrave Vis. Eng. 83 A mazy forest..a-throng with ruddy limbs.

Oxford English Dictionary