24. My father said: ``Abd Allah ibn Ja`far al-Himyari said: Ahmad ibn Muhammad sid, on the authority of `Ali ibn al-Hakam, on the authority of Fudayl, on the authority of Abu `Ubaydah who said that Abu Ja`far al-Baqir said to me: O Abu `Ubaydah! Beware of quarrelers and those who relate lies about us. Verily, they have left what they were ordered to learn and seek from the knowledge of Heaven. O Abu `Ubaydah! Mould people with morals and pursue them with their deeds. Verily, we never consider a person to be wise until he recognizes the tone of speech. He then recited this verse: And most certainly you can recognize them by the tone of (their) speech.