Musnad Abu Ya'la al-Mawsili 111:47

Surayj ibn Yunus narrated to us, Marwan ibn Mu'awiyah narrated to us, from al-A'mash, from 'Abdullah ibn Murrah, from Masruq, from 'Abdullah, regarding the saying of Allah: "We will add to them punishment upon punishment." He said: "Scorpions are added, whose fangs are like long palm trees."