Mentioned in the Atthasáliní (pp. 307-8), Buddhaghosa's Commentary on the Dhammasangani.
The quotation given from it is: "ekam mahábhútam upádáya pásádo pathavidhátuyá tíhi mahábhútehi susangahito ápodhátuyá ca tejodhátuyá ca váyodhátuyá ca." The sutta has, so far, not been traced elsewhere.