What is the legal ruling in Islamic Sharia regarding assisting a married man in covering the costs of an abortion for a girl who claimed to be pregnant by him, while he swears that he did not have intercourse with her in the manner of spouses? And how does he repent from this? And is he considered a participant in killing? And what should he have done, according to Sharia, when the girl made this claim?

Your friend did not fear Allah in his dealings with the foreign woman, so he fell into sin, and then was punished with another sin (abortion), and was unable to deflect the accusation.

However, there is still some good in him, indicating his remorse and his desire to repent, which is only valid with three conditions: 1. Regret for what he has done. 2. Desisting from the sin and completely cutting off his relationship with that woman. 3. Resolving not to return to the sin again, while striving in acts of obedience such as prayers, reading the Quran, and giving charity, so that this may be a good beginning for him.