Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrated that the Prophet (peace and blessings be upon him) said: "O people of Makkah, do not shorten the prayer on a journey of less than four barids, which is the distance from Makkah to Usfan."
Imam al-Tabarani recorded it in al-Mu'jam al-Kabir as a narration of Ibn Mujahid from his father and Ata'. I do not know this person; the remaining narrators of this narration are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2954
Hadith Gradingمحدثین:إسنادہ ضعیف، ایک راوی
Hadith Takhrij«أخرجه المعجم الكبير للطبراني برقم: 11162، وأخرجه معرفة السنن والآثار برقم: 6040»