Sayyiduna Abdullah bin Abi Awfa (may Allah be pleased with him) said: I saw the Prophet (peace and blessings be upon him) prostrating on the fold of his turban. Its chain contains Sa'id bin Anbasah; if he is al-Razi, then he is da'if (weak), and if he is someone else, then I do not know him.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2756