Ja'far bin Muhammad (may Allah have mercy on him) narrates from his father that some woodcutters came to him (peace and blessings be upon him) and said: O Messenger of Allah! We are always travelling; how should we offer the prayer? He (peace and blessings be upon him) said: "Recite the tasbih three times in bowing and in the prostrations."
This too is mursal.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2559