Musnad Abu Ya'la al-Mawsili 154:113

Zuhayr narrated to us, Yazid narrated to us, Sulayman al-Taymi informed us, from Abu Mijlaz, from Ibn Umar: That the Prophet (peace and blessings of Allah be upon him) prostrated in the first rak'ah of the Dhuhr prayer, so his companions thought that he had recited "Tanzil al-Sajdah." He (the narrator) said: And I did not hear it from Abu Mijlaz.