The Messenger of Allah ﷺ stayed at Tabuk twenty days; he shortened the prayer (during his stay). Abu Dawud said: No one narrates this tradition with continuous chain except Ma'mar. (Using translation from Abū Dāʾūd 1235)
أَقَامَ رَسُولُ اللهِ ﷺ بِتَبُوكَ عِشْرِينَ يَوْمًا يَقْصُرُ الصَّلَاةَ