Hadith 2257
´It was narrated that Kab bin 'Asim said:` "I heard the Messenger of Allah say; 'It is not righteousness to fast when traveling."'
Hadith 2258
´It was narrated that Saeed bin Al-Musayyab said:` "The Messenger of Allah said: 'It is not righteousness to fast when traveling."' (Sahih) Abu 'Abdur-Rahman (An-Nasai) said: This is a mistake, and what is correct is the one that is before it. We do not know of anyone who followed up Ibn Kathir.