Sunan Abi Dawud 46
سنن أبي داود#46Sahihحَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، عَنْ سُفْيَانَ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، يَرْفَعُهُ قَالَ " لَوْلاَ أَنْ أَشُقَّ، عَلَى الْمُؤْمِنِينَ لأَمَرْتُهُمْ بِتَأْخِيرِ الْعِشَاءِ وَبِالسِّوَاكِ عِنْدَ كُلِّ صَلاَةٍ " .
Narrated Abu Hurayrah :(the Prophet, sal Allaahu alayhi wa sallam ) as saying : Were it not that I might oeverburdern the believers, I would order them to delay the night ('isha ) prayer and use the tooth-stick at the time of every prayer
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Bukhari (887، 7240) Sahih Muslim (252)
In-book reference: 1:46