Why we find Errors is Some Holy books ?

Hi here is explanation for People who don't beleive in god Because they say they find many errors inside some holy books which is opposite to what sceince said . why these errors while it was sended from god Because it was corrupted by people hands , since people after prophets died has altered and changed what was written on these holy books in order to gain some money that's why you find some errors, but for quran it was never corrupted or altered as god wrote inside Quran that he will keep it safe till end of life i mean forever thanks