“See how We have given some of them more than others; yet the Hereafter holds greater ranks and greater favour. (21) Do not set up another god beside Allah, lest you become blameworthy and forsaken. (22) Your Lord has decreed that you worship none but Him, and that you show kindness to your parents. If either or both of them reach old age with you, do not say even ‘uff’—an expression of annoyance—to them, nor rebuke them; rather, speak to them with respectful words. (23)”
“See,” O Muhammad, “how We have given some of them more than others” in provision and righteous deeds (1)—that is, those who seek the immediate life and those who seek the Hereafter—“yet the Hereafter holds greater ranks and greater favour.”
“Do not set up another god beside Allah”: the address is directed to the Prophet, peace and blessings be upon him, while others are intended. It was also said that its meaning is: Do not, O man, set up another god beside Allah (2), “lest you become blameworthy and forsaken”—blameworthy, with none to praise you, and forsaken, with none to support you.
His words, exalted is He, “Your Lord has decreed,” mean: Your Lord has commanded. This was stated by Ibn Abbas, Qatadah, and al-Hasan. Al-Rabi ibn Anas said: “Your Lord has made it obligatory.” Mujahid said: “Your Lord has enjoined.” It is related that al-Dahhak ibn Muzahim recited, “Your Lord has enjoined,” and said: “They joined the letter waw to the letter sad, and it became qaf.” (3)
“That you worship none but Him, and that you show kindness to your parents”: that is, He commanded kindness towards one’s parents, dutifulness to them, and compassion for them.
“If either or both of them reach old age with you”: Hamzah and al-Kisa'i read it with an alif, in the dual form. According to this reading, His words, “either of them or both of them,” form a new sentence, like His saying, “Then many of them became blind and deaf” (al-Ma'idah 5:71), and His saying, “Those who did wrong concealed their secret counsel” (al-Anbiya' 21:3); “those who did wrong” is the subject. The remaining readers recited “reach” in the singular form.