Sforno on Genesis 41:1/ספורנו על בראשית מ״א:א׳

1ויהי מקץ..ופרעה חולם, while he was dreaming about all kinds of matters of no relevance, matters reflecting what he had experienced during the course of the previous day, he also dreamt something totally unrelated to matters he could relate to, i.e. he saw himself standing on the banks of the river. The word חולם in the present tense, as opposed to חלם in the past, recalls Daniel’s statement as well as the Talmud’s statement in Berachot 55 that generally the subjects one dreams about are unfinished business of what one had been thinking of in the course of the previous day.