[Sahih Bukhari: Volume 8, Book 76, Number 472 & 470]
Narrated ‘Aisha (Radi Allah Anha): The Prophet (sal-allahu-alleihi-wasallam) was asked, “What deeds are loved most by Allah?” He said, “The most regular constant deeds even though they may be few.”
Narrated Abu Huraira (Radi Allah Anhu): Allah’s Apostle (sal-allahu-alleihi-wasallam) said, “The deeds of anyone of you will not save you (from the (Hell) Fire).” They said, “Even you (will not be saved by your deeds), O Allah’s Apostle?” He said, “No, even I (will not be saved) unless and until Allah bestows His Mercy on me. Therefore, do good deeds properly, sincerely and moderately, and worship Allah in the forenoon and in the afternoon and during a part of the night, and always adopt a middle, moderate, regular course whereby you will reach your target (Paradise).”
Those who believe, and whose hearts find satisfaction in the remembrance of ALLAH: for without doubt in the remembrance of ALLAH do hearts find satisfaction.
(Surah Rad, 13:28 – The Holy Qur’an)