It is narrated from Hazrat Abu Umamah (may Allah be pleased with him) that once the Noble Prophet (peace and blessings be upon him) was smiling. We asked, "O Messenger of Allah! What makes you smile?" The Noble Prophet (peace and blessings be upon him) replied, "I am amazed at that nation which is dragged to Paradise in chains (their deeds are taking them towards Hell, but Allah’s mercy is taking them towards Paradise)."
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 22203
Hadith Gradingحکم دارالسلام:صحيح لغيره، وهذا إسناد حسن فى المتابعات والشواهد من أجل أبى غالب