Musnad Abu Ya'la al-Mawsili 115:115

Yazid said: I met Shu'bah and narrated this hadith to him. Shu'bah said: Qatadah narrated to me, from Anas bin Malik, from the Prophet (peace be upon him), the [same] hadith, except that Shu'bah placed "dharrah" (an atom/ant) in the place of "dharrah" (an atom/ant). He said: Abu Bistam made a mistake in it.