Musnad Abu Ya'la al-Mawsili 111:142

Narrated to us Ubayd Allah ibn Umar, narrated to us Abu Bakr ibn Abd Allah al-Bakri, narrated to us Amr ibn Malik, from Abu al-Jawza’, from Ibn Abbas regarding the saying of Allah, the Mighty and Majestic: "By your life" (la-amruka) [Surah al-Hijr: 72]. He said: "By your life."