بلوغ المرام
كتاب الصلاة
Book 2, Hadith 406
الإسناد
المتن
وَأَصْلُهُ فِي اَلصَّحِيحَيْن ِ 1 ‏ .‏
And its basic meaning is in the Sahihain (of al-Bukhari and Muslim)].