Sesungguhnya imam dijadikan untuk diikuti, apabila dia rukuk maka rukuklah, bila dia mengangkat kepalanya maka angkatlah kepala
Imam Ahmad : 7809وَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِنَّمَا جُعِلَ الْإِمَامُ لِيُؤْتَمَّ بِهِ فَلَا تَخْتَلِفُوا عَلَيْهِ وَإِذَا كَبَّرَ فَكَبِّرُوا وَإِذَا رَكَعَ فَارْكَعُوا وَإِذَا قَالَ سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ فَقُولُوا اللَّهُمَّ رَبَّنَا لَكَ الْحَمْدُ وَإِذَا سَجَدَ فَاسْجُدُوا وَإِذَا صَلَّى جَالِسًا فَصَلُّوا جُلُوسًا أَجْمَعِينَ
Still going through the same chain route as the previous hadith: from [Abu Hurairah]: And Rasulullah sallallaahu 'alaihi wasallam said: "Only if he is made an imam to be followed, so do not disagree with him, if he makes takbir then make takbir, if he bows then bows, if he says: 'Sami'allahu Liman Hamidah (Allah is all-hearing to those who praise him),' then say: 'Allahumma Rabbanaa Lakal Hamdu (O Allah, all praise is Yours),' if he prostrate then prostrate, and if he prays sitting then pray all of you sitting.
Hadith Corroboration :
Imam Ahmad : 6847, 7809, 8146, 8534, 8961, 9069, 9275, 9765, 10960, 11631, 12195, 12598, 13689, 18770, 18801, 23116, 23168, 23260, 23994, 24439
Imam Bukhari : 365, 647, 648, 680, 690, 691, 692, 763, 1046, 1047, 1160, 5226
Imam Muslim : 622, 623, 625, 628
Imam Abu Dawud : 509, 511, 512
Imam Tirmidzi : 329
Imam Nasa'i : 786, 821, 823, 912, 913, 1051
Imam Ibnu Majah : 837, 1227, 1228, 1229
Imam Malik : 280, 281
Imam Darimi : 1228, 1277