Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: This verse was revealed to the Prophet (peace and blessings be upon him): "Your wives are a tilth for you." So this was a concession regarding intercourse in the rear passage.
Al-Tabarani recorded it in al-Mu'jam al-Awsat from his shaykh Ali bin Sa'id bin Bashir, who is a hafiz; al-Daraqutni (may Allah have mercy on him) said about him: He is not of that standing. The rest of its narrators are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب التفسير / 10860