The possessive dative construction involves a subject possessee, a dative possessor, and a form of esse:
- Mihi soror est.
- Dicit sibi sororem esse.
In this construction, is esse ever elided? That is, can you say e.g. Dicit sibi sororem? I don't think I've seen such cases, and the fact that esse in this construction has an existential force may mean it's obligatorily expressed. But I don't recall seeing any discussion of this in grammars. Can anyone point to either a case of such elision, or a grammatical reference on this topic?