Sunan an-Nasa'i, Hadith 5720 ⓘ
It was narrated from Sa'eed bin Al-Musayyab that : Abu Ad-Darda' used to drink that of which two-third had gone and one-third was left.
أَخْبَرَنَا زَكَرِيَّا بْنُ يَحْيَى، قَالَ حَدَّثَنَا عَبْدُ الأَعْلَى، قَالَ حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ، عَنْ دَاوُدَ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، أَنَّ أَبَا الدَّرْدَاءِ، كَانَ يَشْرَبُ مَا ذَهَبَ ثُلُثَاهُ وَبَقِيَ ثُلُثُهُ .
also referenced under: Book 51, Hadith 182 (In-Book) & Volume 6, Book 51, Hadith 5723 (DarusSalam)