If someone/woman gives an advice(with a bad intention) to a woman to divorce her husband (for simple/non-valid reasons), What would be his/her punishment in the hereafter according to the Quran and Sunnah?
There is no worldly punishment indicated through as appears in my research. Though, the issue is mentioned quite a lot specially from family members pressing their son or daughter to divorce the other.
In one of the questions asked to islamweb.net, the answer was that it is a major sin to do it. The one asking was telling that he felt in love with a married women and made a promise with her to marry her when she is divorced from his husband who, as the one asking said, was doing many haram things.
In addition, what this woman is doing is a manifestation of fasad (corruption), and Allah does not like corrupters.
And they strive throughout the land [causing] corruption, and Allah does not like corrupters. Quran
I just cannot understand why one would feel to ask such a question. I mean, really, we know from our tradition about the women who was a devout worshiper but did not feed nor let the cat feed from the worms of the ground, and thus is in the hellfire regardless of what she did good.
Something I feel sad about is that some Muslims feel that they are on contract with Allah, so if something bad seems not important or little people will do it because they will still pass to paradise. We forgot what Omar ibn Al-Khattab said once, that even if one of his legs is in the paradise, he is not sure that the latter will make it there too.
You can be a devout worshiper, but because of small thing you go to hellfire, while one might enter paradise with so many sins because of some sincere doings.