He also said:

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The claim made by some that “reward is proportionate to hardship” is not unconditionally correct. Some groups may invoke it to justify various forms of “monastic austerities and innovated acts of worship” that Allah and His Messenger have not prescribed. These resemble the prohibitions imposed by the polytheists and others on the wholesome things Allah has made lawful, as well as the excessive rigor and extremism condemned by the Prophet, may Allah bless him and grant him peace, when he said:

“Those who go to extremes have perished.”

He also said:

“Had the month been prolonged for me, I would have continued fasting without a break in a manner that would make those who pursue excessive rigor abandon it.”

Examples include excessive hunger or thirst that harms the mind and body and prevents the performance of obligatory or recommended acts more beneficial than it. The same applies to going barefoot, going unclothed, and walking in ways that harm a person without any benefit. An example is the report of Abū Isrā’īl, who vowed to fast and to remain standing without sitting down, seeking shade, or speaking. The Prophet, may Allah bless him and grant him peace, said: “Tell him to sit down, seek shade, speak, and complete