How can one reduce their sleep to be able to perform the night vigil (Qiyam al-Layl), following the example of the righteous predecessors who were known for this, such as Sa'id ibn al-Musayyib, who prayed Fajr with the ablution of Isha for twenty years, and what is the dividing line between excessive eating and drinking and moderating them, in accordance with their advice on this matter?

Praying Qiyam al-Layl (night vigil prayer) is a means of entering Paradise, expressing gratitude for Allah's blessings, drawing closer to Allah, receiving forgiveness for sins, expiating misdeeds, attaining divine blessings, having prayers answered, and earning multiplied rewards. To persevere in it, it is recommended to take a siesta (daytime nap), sleep in the early part of the night, strive against one's self upon waking by engaging in dhikr (remembrance of Allah), performing wudu (ablution), and praying, avoiding sins and transgressions, sleeping on the right side, and having a light dinner.