It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said in the explanation of "Maqam Mahmood" that it refers to intercession (Shafa'at).
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 10200
Hadith Gradingحکم دارالسلام:حسن لغيره، وهذا إسناد ضعيف لضعف داود