(3) Purification
كتاب الطهارة
(4c) Chapter: The tooth-stick - Section 3
(3) باب السواك - الفصل الثالث
Mishkat al-Masabih 385 
Ibn ‘Umar reported the Prophet as saying, “I had a dream in which I was using a tooth-stick, when two men, one older than the other, came to me. I handed the tooth-stick to the younger of the two and was told to respect the senior, so I handed it to the older.” (Bukhari and Muslim.)
عَنِ ابْنِ عُمَرَ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: " أَرَانِي فِي الْمَنَامِ أَتَسَوَّكُ بِسِوَاكٍ فَجَاءَنِي رَجُلَانِ أَحَدُهُمَا أَكْبَرُ مِنَ الْآخَرِ فَنَاوَلْتُ السِّوَاكَ الْأَصْغَرَ مِنْهُمَا فَقِيلَ لي: كبر فَدَفَعته إِلَى الْأَكْبَر مِنْهُمَا "
 مُتَّفَقٌ عَلَيْهِ  (الألباني)حكم :
Reference : Mishkat al-Masabih 385
In-book reference : Book 3, Hadith 94