Hadith 15:358
Abu Bakr narrated to us, he said: Azhar narrated to us, from Ibn 'Awn, who said: Muhammad [Ibn Sirin] would not say "vinegar" [for] wine, and he would say "grape vinegar," and he would dip [his food] in it.
حدثنا أبو بكر قال حدثنا أزهر عن بن عون قال كان محمد لا يقول خل خمر ويقول خل العنب وكان يصطبغ فيه