The Culavamsa (Cv.xxxvii.191) mentions a sutta by this name. The Commentaries on the Dhammapada (DhA.iii.436ff) and the Khuddakapātha (KhpA.162ff) contain accounts of the visit paid by the Buddha to Vesāli in order to drive out from there the fears of famine and pestilence, and they describe in great detail the celebrations which took place as the Buddha returned to Rājagaha along the Ganges. This journey is called Gangārohana.
The Sutta mentioned is probably, therefore, the Ratana Sutta (q.v.) which the Buddha preached at Vesāli.