Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "The Qur'an has been revealed in seven ahruf, and each of its verses has an outer aspect and an inner aspect." The Prophet (peace and blessings be upon him) also forbade that a man lie flat on his back. The narrator says: I think the words in the narration are: "in the mosque, and place one foot on the other."
Al-Bazzar and Abu Ya'la in al-Kabir recorded it; in his narration the words are: "Each harf of it has an inner aspect and an outer aspect."
Al-Tabarani recorded it in al-Mu'jam al-Awsat with its last part abridged. The narrators of Abu Ya'la are thiqat (trustworthy). In al-Bazzar's narration it is mentioned that it is reported via Muhammad bin Ajlan from Abu Ishaq, and at its end he said: Muhammad bin Ajlan narrated no report from Ibrahim al-Hajari other than this one. (Allamah al-Haythami says:) I say: Muhammad bin Ajlan narrated from Abu Ishaq al-Sabi'i; if this refers to Abu Ishaq al-Sabi'i, then the narrators of al-Bazzar are also thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب التفسير / 11579
Hadith Gradingمحدثین:إسنادہ صحیح
Hadith Takhrij«أخرجه مسند أحمد برقم: 19666، وأخرجه المستدرك على الصحيحين برقم: 2939، وأخرجه المعجم الكبير للطبراني برقم: 6853، وأخرجه صحيح ابن حبان برقم: 75، 5551، 5554، وأخرجه السنن الكبرى للنسائي برقم: 8336، وأخرجه البحر الزخار المعروف بمسند البزار 10 - 18 برقم: 8010، وأخرجه شرح مشكل الآثار برقم: 3077، 3095، وأخرجه إتحاف الخيرة المهرة بزوائد المسانيد العشرة برقم: 5929/3، 5930/6، وأخرجه مسند البزار برقم: 2081»