Hanzalah Sudusi says: I said to Ikrimah that I recite Surah Al-Falaq and Surah An-Naas in the Maghrib prayer, but people find fault with me for this. He said: There is no harm in this, you can recite them, because they are from the Qur'an. Abdullah ibn Abbas (may Allah be pleased with him) even narrated this hadith to me that the Messenger of Allah (peace and blessings be upon him) came and prayed two rak'ahs and in them he recited only Surah Al-Fatihah.
Hadith Referenceالفتح الربانی / أبواب صفة الصلاة / 1631
Hadith Gradingمحدثین:ضعیف
Hadith Takhrij«اسناده ضعيف لضعف حنظلة السدوسي۔ أخرجه البيھقي: 2/ 61 مختصرا بالمرفوع فقط، وأخرجه بطوله ابن خزيمة513 ، (انظر مسند أحمد ترقيم الرسالة: 2550 ترقیم بيت الأفكار الدولية: 2550»
Brief Explanation
Benefits: … This narration is indeed weak, but sufficing with Surah al-Fatihah in every rak‘ah is correct; its clarification has already been given earlier.