Khalid al-Hadhdha' narrates: I taught Ibn Sirin the tashahhud. I narrated to him the hadith from Abu Nadrah from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him), so he adopted the words of the tashahhud that I narrated and abandoned the words of his own tashahhud.
Al-Tabarani recorded it in al-Mu'jam al-Awsat, and its narrators are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2855