Muwatta Malik
Book 1, Hadith 20
Arabic hadith text
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ دَاوُدَ بْنِ الْحُصَيْنِ، قَالَ أَخْبَرَنِي مُخْبِرٌ، أَنَّ عَبْدَ اللَّهِ بْنَ عَبَّاسٍ، كَانَ يَقُولُ دُلُوكُ الشَّمْسِ إِذَا فَاءَ الْفَىْءُ وَغَسَقُ اللَّيْلِ اجْتِمَاعُ اللَّيْلِ وَظُلْمَتُهُ .
Translation
Yahya related to me from Malik that Da'ud ibn al-Husayn said thatsomeone had told him Abdullah ibn Abbas used to say, "Duluk ash-shamsbegins from when the sun passes the meridian. Ghasaq al-layl is thegathering of the night and its darkness."