What is the ruling on the statement that the word "مطر" (rain) in the Holy Quran was used exclusively in the sense of torment, and that the correct words to denote water descending from the sky to irrigate the earth are "الماء" (water) or "الغيث" (rainfall/succour)?

The term "rain" (مطر) in the Holy Quran is often used in the context of punishment, as stated by Ibn Uyaynah, though scholars made an exception for the verse: "If you are afflicted by harm from rain" (Quran 4:102).

However, in the Arabic language and the Prophetic Sunnah, it has been used in contexts of both mercy and punishment, and there is no difference between "amṭarat" (caused to rain) and "maṭarat" (it rained) in terms of usage.

Therefore, there is no harm in using it in ordinary speech, and it is not disliked.