1740/1 - Abu Hurayrah (may Allah be pleased with him) reported that the Prophet (may Allah’s peace and blessings be upon him) said: “Do not call grapes as Karm, for Karm is the Muslim.” [Narrated by Al-Bukhāri and Muslim - this is his wording]
Another narration reads: “Indeed, Karm is the believer’s heart.” Another narration by Al-Bukhāri and Muslim reads: “They say: Karm, indeed, Karm is the believer’s heart.”
1741/2 - Wā’il ibn Hijr (may Allah be pleased with him) reported that the Prophet (may Allah’s peace and blessings be upon him) said: “Do not say: Karm; rather, say grapes and Habalah.” [Narrated by Muslim]
1) It is disliked to use the word Karm to refer to grapes, for the Muslim is more worthy of this name.
2) It shows how the Shariah is keen on correcting common mistakes in people’s speech and promoting the use of the right words instead. This is one of the good aspects of the Islamic legislation.