Musnad al-Bazzar, Hadith no. 2081
“tilawat achhi cheez hai, lekin sirf tilawat kafi nahi hai. Woh ek foreign language hai, woh hum puri tarah samajh bhi nahi sakte. Aur Quran ke bare mein aata hai ke likul ayat minha zahr wa batan, ke har ayat mein ek outer meaning hai, ek inner meaning hai. To outer meaning to aap samajh lenge, lekin inner meaning ke liye tadabbur karna hoga. To yeh tasfeer Quran, ismein ye saare jo passage hain, ye tadabbur wale pa”