Hadith 611
Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates that when the Messenger of Allah (peace and blessings be upon him) would raise his back from bowing (ruku‘), he used to say « سَمِعَ اللهُ لِمَنْ حَمِدَهُ ». Then, while standing, he would recite « رَبَّنَا وَلَكَ الحَمْدُ ».