عَنْ أَنَسٍ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أولم على صَفِيَّة بسويق وتمر. رَوَاهُ أَحْمَدُ وَالتِّرْمِذِيُّ وَأَبُو دَاوُدَ وَابْنُ مَاجَهْ

‘Ikrima, on the authority of Ibn ‘Abbas, said the Prophet forbade that the food of two people who were rivalling one another should be eaten. Abu Dawud transmitted it. Muhyi as-Sunna said the sound version is that it comes from ‘Ikrima from the Prophet in mursal form.