Is the Qur’an a miracle or merely a challenge? What is the proof of that? And is the reward commensurate with the hardship?

The Holy Quran is the eternal miracle of the Prophet Muhammad, peace and blessings be upon him. It is the word of Allah, the Almighty, and its miraculous nature is everlasting, unlike the miracles of previous prophets. Allah challenged humans and jinn to produce a text like it, but they failed.

As for the proof that reward is commensurate with hardship, it is the hadith of Aisha, may Allah be pleased with her, in which it is mentioned that the reward and virtue in worship increase with increased effort and expenditure, provided that the hardship is not blameworthy according to Islamic law.