Fasting instead of temporary marriage?

Question:

Has the Qur’an commanded that one should remain single (24:33) and fast if one cannot afford a permanent marriage and thereby leaving the temporary marriage?

Answer:

No, he did not.

Muhammad Ibn Jamhur reported that Imam As-Sadiq (a.) mentioned the verse: “What God opens to the people in mercy, no one can withold it.” (35:2) He said: “This includes the temporary partnership (Mut’ah).” Huraiz reported that Imam As-Sadiq ( a. ) read: Those shall remain chaste, for whom no temporary partnership is given, until God makes them rich out of His grace.” (24:33) He said: “That is exactly how it was revealed.” Sa’d Ibn Abdillah reported that the Imams Al-Baqir (a.) and As-Sadiq (a.) were reading: “To those of them whom you have enjoyed for a limited time, you shall give their due compensation.” (4:24) [Mustadrak-ul-Wasa’il by Al-Mirza An-Nuri, Volume 14, page 448]

وعن محمد بن جمهور، عن بعض أصحابنا، عن أبي عبد الله عليه السلام في قوله تعالى ما يفتح الله للناس من رحمة فلا ممسك لها قال عليه السلام منه المتعة وعن حماد، عن حريز، عن أبي عبد الله عليه السلام أنه قرأ وليستعفف الذين لا يجدون نكاحا بالمتعة حتى يغنيهم الله من فضله هكذا التنزيل سعد بن عبد الله القمي في كتاب ناسخ القرآن ومنسوخه: قال قرأ أبو جعفر وأبو عبد الله عليهما السلام فما استمتعتم به منهن إلى أجل مسمى فآتوهن أجورهن إلى آخره