Hazrat Zahra (peace be upon her) used to ask Imam Hasan (A.S) and Imam Hussein (A.S) to sit beside her on the night of Power (Laylat al-Qadr) and whenever they were about to fall asleep, she used to throw water on faces of those two ornaments of Paradise so that they stay awake and don’t miss the mercy of Allah Almighty.
source : erfan.ir