Using a Mushaf as a Pillow
Interpreters mention that whoever sees themselves using a Mushaf as a pillow in a dream, it may indicate that they are a person who does not fulfill the rights and duties associated with the Holy Quran. This vision is interpreted as a warning against neglecting the teachings of the Quran and not acting upon them, based on the prophetic prohibition against using the Quran as a pillow.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam