Musa bin Salamah (may Allah have mercy on him), the student of Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both), said: We were with Sayyiduna Ibn Abbas (may Allah be pleased with them both) in Makkah, and I said: "When we are with you people (praying behind a resident imam), we pray four rak'ahs, and when we return to our lodgings, we pray two rak'ahs (what is the reason for this)?" He said: "That is the Sunnah of Abu al-Qasim (peace and blessings be upon him)."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Ayyub except Muhammad bin Abd al-Rahman al-Tufawi and al-Harith bin Umayr."
Hadith Referenceالمعجم الأوسط / باب العين / 4294
Hadith Gradingمحدثین:رجاله رجال الصحيح
Hadith Takhrij«قال ابن الملقن: وهذا الإسناد رجاله كلهم محتج بهم في الصحيح «البدر المنير في تخريج الأحاديث والآثار الواقعة في الشرح الكبير، ج 4، ص 554»» «أخرجه أحمد فى «مسنده» برقم: 1887، والطبراني فى «الكبير» برقم: 12895، والطبراني فى «الأوسط» برقم: 6334»