In the poem Hyndluljóð, Freyja offers to the jötunn woman Hyndla to blót (sacrifice) to Thor so that she may be protected, and comments that Thor does not care much for jötunn women [REF].
In the Prose Edda, Thor is mentioned in all four books; Prologue, Gylfaginning, Skáldskaparmál, and Háttatal.