Jami` at-Tirmidhi Book 44, Hadith 7
that the Messenger of Allah (ﷺ) narrated: "The parable of the believer who recites the Qur'an is that of a citron, its fragrance is nice and its taste is nice. The parable of the believer who does not recite the Qur'an is that of a date, it has no smell but its taste is sweet. The parable of the hypocrite who recites the Qur'an is that of basil, its fragrance is nice but its taste is bitter. The parable of the hypocrite who does not recite the Qur'an is that of the colocynth, its smell is better and its taste is bitter.'"
(Another chain) with similar in meaning.
that the Messenger of Allah (ﷺ) said: "The parable of the believer is like the plant; the wind does not stop causing it to sway, and the believer does not stop suffering trials. The parable of the hypocrite is that of a cedar tree, it does not give in until it is cut down."