Quran 9:113 — Ultimatum (Bara'ah)

Neither the prophet, nor those who believe shall ask forgiveness for the idol worshipers, even if they were their nearest of kin, once they realize that they are destined for Hell.

[9:112] They are the repenters, the worshipers, the praisers, the meditators, the bowing and prostrating, the advocators of righteousness and forbidders of evil, and the keepers of GOD's laws. Give good news to such believers.

[9:114] The only reason Abraham asked forgiveness for his father was that he had promised him to do so. But as soon as he realized that he was an enemy of GOD, he disowned him. Abraham was extremely kind, clement.