Ya ayyuha allatheena amanoo la tuharrimoo tayyibati ma ahalla Allahu lakum wala (surah Maidah: 87)

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(5:87) Believers! Do not hold as unlawful the good things which Allah has made lawful to you, *104 and do not exceed the bounds of right. *105 Allah does not love those who transgress the bounds of right.

Yaaa aiyuhal lazeena aamanoo laa tuharrimoo taiyibaati maaa ahallal laahu lakum wa laa ta`tadooo; innal laaha laa yuhibbul mu`tadeen

*104). This verse embodies two directives. The first is that man should not attribute to himself the authority to proclaim things either lawful or unlawful according to his own wishes. Only that which God has held to be lawful is lawful, and only that which God has declared unlawful is unlawful. If men were to declare certain things either lawful or unlawful on their own authority, they would not be following the law of God but their own laws. The second directive is that they should not adopt the course of world-renunciation and abstention from worldly pleasures as the Christian monks, Hindu mendicants, Buddhist bhikshus and illuminist mystics did. Religious-minded and virtuous people have always tended to consider their physical and carnal desires an impediment to spiritual growth. They have considered suffering, deprivation from worldly pleasures and abstention from the means of worldly sustenance to be acts of goodness and indispensable for achieving proximity to God. Even some of the Companions leaned in this direction. The Prophet (peace be on him) once came to know that some Companions had resolved that they would fast without interruption, that instead of spending the night on their beds they would remain awake praying, that they would consume neither meat nor fat, and would have no (sexual) relations with women. The Prophet (peace be on him) addressed the people on this subject and said: 'I have not been commanded to do so. Even your own self has rights against you. So, fast on certain days and refrain from fasting on others. Stay awake praying at night and also sleep. Look at me; 1 sleep as well as stay awake (praying); sometimes I fast and sometimes I don't. I consume meat as well as fat. Whosoever dislikes my way does not belong to me.' He then added: 'What has happened to people that they have prohibited for themselves women, good food, perfumes, sleep and the pleasures of the world, whereas I have not taught you to become monks and priests. In my religion there is neither abstention from women nor from meat, neither seclusion nor withdrawal.
For the purposes of self-control my religion has fasting. As for monasticism, all its benefits can be derived from jihad (struggle in the way of God). Serve God and associate none with Him. Perform Hajj and 'Umrah, establish Prayers, dispense Zakah and observe the fasts of Ramadan. Those who were destroyed before you were destroyed because they were severe with themselves, and when they became severe with themselves God became severe with them as well. It is the remnants of such people who you see in the oratories and hermitages of monks.' (Ibn Kathir, vol. 2, pp. 626 and 628-9 - Ed.)
There are traditions to the effect that the Prophet (peace be on him) once came to know that one of his Companions was always so preoccupied with worship and devotion that he did not approach his wife for long periods. The Prophet (peace be on him) called for him and directed him to go to his wife. On being told that he was fasting, the Prophet (peace be on him) asked him to break the fast and proceed to his wife. During the reign of 'Umar a lady once lodged the complaint that her husband fasted all day and prayed all night and had no relations with her. 'Umar appointed the famous Successor (Tabi'i), Ka'b b. Thawr al-Azdi to look into the matter. He issued the judgement that the husband had the right to spend three nights in Prayer if he so wished, but every fourth night was the right of his wife. (Fiqh al-Sunnah, vol. 2, p. 164 - Ed.)
*105). 'Do not exceed the bounds of right' has a broad signification. To hold the things which are lawful to be unlawful, and to shun the things declared by God to be clean as if they were unclean, is in itself an act of wrongful excess. It should be remembered, at the same time, that extravagant indulgence even in clean things is an act of wrongful excess. Likewise, to overstep the limits of the permissible is also an act of wrongful excess. God disapproves of all three kinds of excess.