Nafi' narrates from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that when the Messenger of Allah (peace and blessings be upon him) began the prayer, he would start it with "'In the name of Allah, the Most Gracious, the Most Merciful' [Surah al-Fatihah: 1]". In the narration of al-Zahid, instead of 'yabda'u' (he would start) the words are 'yaqra'u' (he would recite), and he added that when Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) began the prayer, he would recite 'Bismillah al-Rahman al-Rahim' (In the name of Allah, the Most Gracious, the Most Merciful) at the start of Surah al-Fatihah, and he would also recite Bismillah at the start of the surah he recited after al-Fatihah.
The correct version is that it is mawquf (the practice of Ibn Umar himself).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2403
Hadith Gradingمحدثین:ضعيف
Hadith Takhrij«ضعيف۔ اخرجه الطبراني في الاوسط 1/257»