Sayyiduna Abu Hurayrah (may Allah be pleased with him) relates: Previously, the Prophet (peace and blessings be upon him) used to turn to the right and left during the prayer. Then Allah Almighty revealed this verse: "Successful indeed are the believers, those who are humble in their prayer." After that, the Prophet (peace and blessings be upon him) remained in humility and did not turn to the right or left.
Al-Tabarani recorded it in al-Mu'jam al-Awsat and said: The narrator Hibarah bin Najm al-Iskandarani is alone in narrating it. (Allamah al-Haythami says:) I say: I have not found anyone who has given his biography, and the rest of the narrators of this narration are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2430