Musnad Ahmad 2:206

Isma'il narrated to us again, he said: Salamah ibn 'Alqamah informed us, from Muhammad ibn Sirin, who said: I was informed about Abu al-'Ajfa', who said: I heard 'Umar saying: "Beware of exaggerating the dowries of women..." then he mentioned the hadith. Isma'il said: Ayyub, Hisham, and Ibn 'Awn mentioned from Muhammad, from Abu al-'Ajfa', from 'Umar, something similar to the hadith of Salamah, except that they did not say: "Muhammad said: I was informed about Abu al-'Ajfa'."