Imam al-Daraqutni (may Allah have mercy on him) said that Abu Kurz, whose name is Abdullah bin Abd al-Malik al-Fihri, is matruk al-hadith (abandoned in hadith), and no one other than him narrated it from Nafi'.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16353