Sahih Ibn Khuzaima, Hadith no. 1887
“maulana, yeh sawal aaya hai dilli se Shahnawaz Zafar sahib ka, aur unhone likha hai ke hum jante hain ke kuch khaas mahine ya kuch khaas auqat mein kisi ibadat ya kisi amal ka sawab kai guna badha diya jata hai, jaisa ke Ramzan mein namaz ka sawab satar guna zyada ho jata hai.”