Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates from the Prophet (peace and blessings be upon him) that he (peace and blessings be upon him) said: "Whoever does not possess that taqwa (God-consciousness) which can prevent him from disobeying Allah in solitude, then Allah does not care about anything else from his (other) deeds."
Hadith Referenceمسند الشهاب / 504
Hadith Gradingمحدثین:إسناده ضعيف
Hadith Takhrij«إسناده ضعيف ، وأخرجه تاريخ دمشق : 5/ 395» دیکھئے حدیث نمبر41