Ali (RA) said: The Mut'a is a mercy from Allah to his servants. If it were not for Umar forbidding it, no one would commit (the sin) of fornication except the wretched (Shaqi; an utmost wrong-doer)."
Tafsir al-Kabir, by al-Tha'labi, under commentary of verse 4:24 of Quran;
Tafsir al-Kabir, by Fakhr al-Razi, v3, p200, commentary of verse 4:24;
Tafsir al-Kabir, by Ibn Jarir al-Tabari, under commentary of verse 4:24 with authentic chain of narrators, v8, p178, Tradition #9042;
Tafsir al-Durr al-Manthoor, by al-Suyuti, v2, p140, from several chain of transmitters;
Tafsir al-Qurtubi, v5, p130, under commentary of verse 4:24 of Quran;
Tafsir Ibn Hayyan, v3, p218, under commentary of verse 4:24 of Quran;
Tafsir Nisaboori, by al-Nisaboori (8th century);
Ahkam al-Quran, by Jassas, v2, p179, under commentary of verse 4:24.
"The Verse of Mut'ah was revealed in Allah's Book, so we did it at the time of Allah's Apostle, and nothing was revealed in Quran to make it illegal, nor did the Prophet prohibit it till he died. But a man (who regarded it illegal) expressed what his own mind suggested".
Sahih al Bukhari Arabic-English, v6, Hadith number 43
Note: For the above Hadith, the Saudi translator of Sahih al-Bukhari (Muhammad Muhsin Khan) has changed the word "Mut'ah" to "Hajj-at-Tamatu". This is while in the Arabic text of the Hadith of al-Bukhari which is beside the English text, the word "Mut'ah" has been used alone.
Fathul Qadeer:
Ibn Abbas said the verse of Mut'ah - i.e. it has not been abrogated.
Tafseer Fathul Qadeer Volume1 p. 14
In Tafseer Mu'alim al Tanzeel
Ibn Abbas said: "The verse of Mut'ah was an order and it's Halal.
Tafseer Mu'alim al Tanzeel volume1 p. 63
In Tafseer Kabeer:
The verse of Mut'ah appears in the Qur'an, no verse has come down to abrogate it.
Tafseer Kabeer Volume3 p. 9
We read in Umdah:
Allamah ibn Barr said that the tradition on the prohibition of Mut'ah on the Day of Khayber is wrong.
Umdah thul Qari Volume 8 page 311