In the name of Allah most gracious most merciful
Assalaamu alaykum wa rahmatuallahi wa barakatuhu

Moderation in Worship

Allah, the Exalted, says:
"Ta-Ha. We have not sent down the Qur'an unto you (O Muhammad (PBUH)) to cause you distress". (20:1,2)
"Allah intends for you ease, and He does not want to make things difficult for you". (2:185)
  Aishah (May Allah be pleased with her) reported: The Prophet (PBUH) came in when a woman was sitting beside me. He asked me, "Who is she?'' I said: "She is the one whose performance of Salat (prayer) has become the talk of the town.'' Addressing her, he (PBUH) said, "(What is this!) You are required to take upon yourselves only what you can carry out easily. By Allah, Allah does not withhold His Mercy and forgiveness of you until you neglect and give up (good works). Allah likes the deeds best which a worshipper can carry out constantly".
[Al-Bukhari and Muslim].
Commentary:
1. This Hadith prohibits `Ibadah (worship) beyond one's capacity lest one gets tired and stops it altogether. One should be, therefore, moderate in this respect.
2.  Allah likes that good action which is done regularly, even if it is a small one. Any good deed which is done continuously, will also have an everlasting reward. On the contrary, a good deed which is done for a short period will have a short return.

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.  Anas (May Allah be pleased with him) reported: Three men came to the houses of the wives of the Prophet (PBUH) to inquire about the worship of the Prophet (PBUH). When they were informed, they considered their worship insignificant and said: "Where are we in comparison with the Prophet (PBUH) while Allah has forgiven his past sins and future sins". One of them said: "As for me, I shall offer Salat all night long.'' Another said: "I shall observe Saum (fasting) continuously and shall not break it". Another said: "I shall abstain from women and shall never marry". The Prophet (PBUH) came to them and said, "Are you the people who said such and such things? By Allah, I fear Allah more than you do, and I am most obedient and dutiful among you to Him, but still I observe fast and b