Why was the verse: (And the sun runs to its resting place) recited with the reading: (And the sun runs, having no resting place), and is this reading considered valid?

The answer to the question "Why did they recite the verse with this particular reading?" depends on the authenticity of the reading. This reading has been mentioned in books of exegesis and Sunnah, but its chains of transmission (asanid) are not free from weakness, especially since the chain revolves around Muhammad ibn Hassan, who is unknown and criticized by some scholars, and described as having been deceptively introduced due to his downfall. A group of scholars have pointed out the invalidity of this reading due to its contradiction with the widely transmitted (mutawatir) reading of the majority, and because authentic chains of transmission from Ibn Abbas and others support the mutawatir reading. Based on this, this reading is not established.