It is narrated from Hazrat Abu Israil (may Allah be pleased with him) that once the Prophet (peace and blessings be upon him) entered the Prophet's Mosque while he was praying. Someone said to the Prophet (peace and blessings be upon him), "O Messenger of Allah! (peace and blessings be upon him) This is the man who neither sits nor talks to people, nor sits in the shade, and he wants to fast." The Prophet (peace and blessings be upon him) said, "He should sit, talk to people, sit in the shade, and also fast."
Hadith Referenceمسند احمد / مسند الشاميين / 17532
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا مرسل لأن أبا إسرائيل يخبر عن قصة أبى إسرائيل، والله أعلم