Narrated Yahya b. Yazid al-Hannani:I asked Anas b. Malik about the shortening of the prayer (while travelling). He said: When the Messenger of Allah (ﷺ) went out on a journey of three miles or three farsakh (the narrator Shu'bah doubted), he used to pray two rak'ahs
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“Read in the name of your Lord who created.” 96:1
“My Lord, increase me in knowledge.” 20:114
“So remember Me; I will remember you.” 2:152
“Indeed, with hardship comes ease.” 94:6