كتاب الصلاة
2  
Prayer (Kitab Al-Salat)
(272)
Chapter: The Supplication With Which The Prayer Should Be Started
(123)
باب مَا يُسْتَفْتَحُ بِهِ الصَّلاَةُ مِنَ الدُّعَاءِ
Sunan Abi Dawud 769
Malik said:
There is no harm in uttering supplication in prayer, in its beginning, in its middle, and in the end, in obligatory prayer or other.
حَدَّثَنَا الْقَعْنَبِيُّ، عَنْ مَالِكٍ، قَالَ لاَ بَأْسَ بِالدُّعَاءِ فِي الصَّلاَةِ فِي أَوَّلِهِ وَأَوْسَطِهِ وَفِي آخِرِهِ فِي الْفَرِيضَةِ وَغَيْرِهَا ‏.‏
Grade: Sahih Maqtu' (Al-Albani)  صحيح مقطوع   (الألباني) حكم   :
Reference : Sunan Abi Dawud 769
In-book reference : Book 2, Hadith 379
English translation : Book 2, Hadith 768