This hadith has been narrated on the authority of Sa'd with the same chain of transmitters but there is no mention of the word" journey".
Sahih Muslim Book 37, Hadith 45
← Previous Hadith Anas b. Malik reported to them (his companions) that Allah's Messnger (ﷺ) had granted concession to Abd al-Rahman b. *Anf and Zubair b. 'Awwam for the wearing of a silk shirt during the journey and because of itch which they both had or any other disease from which both of them had been suffering.

Sahih Muslim Book 37, Hadith 44 Next Hadith → Anas reported that Allah's Messenger (ﷺ) granted concession, or Zubair b. Awwam and 'Abd Al-Rahman b. Auf were granted concession, for the wearing of silk because of the itch that they both had.

Sahih Muslim Book 37, Hadith 46