Abu Dawud said : Ahmad (b. Hanbal) said: It is pleasing to me that one should recite in the obligatory prayer those supplications which have occurred in the Quran.
In-book : Book 2, Hadith 494
English translation : Book 2, Hadith 883
2. Prayer (Kitab Al-Salat)
باب الدُّعَاءِ فِي الصَّلاَةِ