Q 3: A long time ago, my mother vowed to slaughter an animal after the return of her brother from travel, but it is not clear whether this vow was made for Allah's Sake or to a sheikh or a Wali (pious person), Allah knows best. It should be mentioned that
the vow is offered in a place where animals are slaughtered for other than Allah.
If the vow is offered in a place where animals are slaughtered for other than Allah, it is impermissible to fulfill it, as
it was related by Imam
Abu Dawud in "Al-Sunan" (Hadith compilations classified by jurisprudential themes)
on the authority of
Thabit ibn Al-Dahhak (may Allah be pleased with him) who said,
A man took a vow to slaughter camels in
Buwanah, so he asked the Prophet (peace be upon him) (about that). The Prophet (peace be upon him) asked, (Part No. 23; Page No. 233) Were there any idols of the Jahiliyyah (pre-Islamic time of ignorance) there that were worshipped?” They said, "No." He said, “Were any of their festivals held there?” They said, "No." He said, “Then fulfill your vow, for no vow should be fulfilled if it involves disobedience to Allah or that which the son of Adam has no control over.
May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.