Hadith 597

‘A'isha said that they used to pray the night prayer at any time after the ending of the twilight until a third of the night had passed. (Bukhari and Muslim)

وَعَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا قَالَتْ: كَانُوا يُصَلُّونَ الْعَتَمَةَ فِيمَا بَيْنَ أَنْ يغيب لاشفق إِلَى ثلث اللَّيْل الأول

Reference: 5605970
In-book reference: Book 4, Hadith 597
Hadith 597 - Prayer - Mishkat al-Masabih - Sunnah.com