Yahya related to me from Malik from Humayd at-Tawil that Anas ibn Malik said, "I stood behind Abu Bakr and Umar and Uthman and none of them used to recite 'In the name of Allah, the Merciful, the Compassionate' when they began the prayer."  

قُمْتُ وَرَاءَ أَبِي بَكْرٍ وَعُمَرَ وَعُثْمَانَ فَكُلُّهُمْ كَانَ لاَ يَقْرَأُ {بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ} إِذَا افْتَتَحَ الصَّلاَةَ  

[Machine] I stood behind Abu Bakr, Umar ibn Al-Khattab, and Uthman, and all of them did not recite "In the name of Allah, the Most Gracious, the Most Merciful" when starting the prayer, like this.  

قُمْتُ وَرَاءَ أَبِي بَكْرٍ وَعُمَرَ بْنِ الْخَطَّابِ وَعُثْمَانَ ؓ فَكُلُّهُمْ كَانَ لَا يَقْرَأُ {بِسْمِ اللهِ الرَّحْمَنِ الرَّحِيمِ} إِذَا افْتَتَحَ الصَّلَاةَ كَذَا