זוהר בראשית — דף ריו ע”ב

Whoever wakes at night to study Torah — it is counted for him as though he built a structure. The Torah spoken at night — a supernal point shines before the Holy One blessed be He. Every novella a person renews in Torah rises above and is completed there. The hidden light within the Torah is the light the Holy One blessed be He stored away for the righteous in the future to come.