From most religion point of views suicide is a taboo and a big no since you go straight to hell for that. That is why most of the countries with strong religious affiliation the suicide rate is significantly lower than other less religious countries for examples Korea and Japan.

Fun facts, there is a group of seven young men believed to live between the time of Jesus and Muhammad, so called The Seven Sleepers. They and a single dog, are reportedly slept in a cave for exactly 300 years (309 years adjusted for lunar calendar) as mentioned in the Quran. The interesting part is that this story is not mentioned in the New or Old Testaments due the time it happened. This story famously becomes part of the very difficult questions, created by the Jews of Madinah (old city name Hijaz) to help the non-believers Arabs to challenge Muhammad of his authenticity as one of the prophets sent by God. The story is recalled in one of the Chapters of the Quran, Al-Kahfi (meaning the The Cave).