Heb 1:1 ¶ God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets,
I subscribe to an academic paper publishing service. One topic which apparently is a popular assignment is on the NT authors' use of OT scripture. There are a few dozen passages offered frequently in the conversation. It is the proliferation of these papers which keeps the subject of Sensus Plenior alive. It might be suggested that the diverse manners spoken of are not well-known.
The author of Hebrews suggests that there are diverse manners in which God had spoken to the prophets. Presumably, the NT authors were able to read those diverse manners and interpret them in light of Christ.
This subject would be too large to leave open, so it is asking for an enumeration only, not a justification and debate. An acceptable answer would have a name of some sort, though standard names may not yet be in our taxonomy, and an example consisting of and OT passage, and a NT reference to it. The reference need not be specifically called out by the NT author, but should plausibly answer the usage pattern.
Name, OT source, NT source, Comment 1 2
I would almost prefer a collaborative answer in building the enumeration, rather than having to sort through multiple answers for a complete one.
-- Some apparently think that asking how God spoke 'to' the prophets is misquoting the verse since in English is says 'by' the prophets. The Greek word 'en' may be translated either way (see Acts 12.11), but that is not the point. In order to speak 'by' or 'through' the prophets, God had to speak 'to' the prophets unless he used them as sock puppets and they had no cognizant participation in the act. Seeing the answers below, it is apparent that God spoke 'to' the prophets in many ways as well as the prophets speaking to the fathers in many ways, eliminating the sock puppet idea.
God spoke to prophets who then spoke to the fathers. I believe that "diverse manners..' refers to 'spoke' and applies to both transactions. Most of the answers appear to agree with this by not distinguishing between the two.
I am appreciative of them all.