Translation:

24. Seest thou not how Allah sets forth a parable? a goodly Word like a goodly tree whose root is firmly fixed and its branches (reach) to the heavens

Notes (Tafseer)

1900. "Goodly word" is usually interpreted as the Divine Word, the Divine Message, the True Religion. It may also be interpreted in a more general sense as a word of truth, a word of goodness or kindness, which follows from a true appreciation of Religion. For Religion includes our duty to Allah and our duty to man. The "evil word" is opposite to this: false religion, blasphemy, false speech, or preaching or teaching unkindness and wrong-doing.