Chapter: Building Structures Over Graves - Narrated Jabir: I heard the Prophet (saws) forbid to sit on the grave, to plaster it with gypsum, and to build any structure over it.
http://www.gowister.com/hadith/abudawud/3231/
Chapter: Women Visiting Graves - Narrated Abdullah ibn Abbas: The Messenger of Allah (saws) cursed women who visit graves, those who built mosques over them and erected lamps (there).
http://www.gowister.com/hadith/abudawud/3242/
If anyone kills himself with something, he will be punished with it on the Day of Resurrection. A vow over which a man has no control is not binding on him. - Grade: Sahih (Al-Albani)
http://www.gowister.com/hadith/abudawud/3263/
I heard the Messenger of Allah (saws) say: An oath or vow to disobey the Lord, or to break ties of relationship or about something over which one has no control is not binding on you.
http://www.gowister.com/hadith/abudawud/3278/
Narrated Abdullah ibn Amr ibn al-'As: The Messenger of Allah (saws)said: An oath or a vow about something over which a human being has no control, and to disobey Allah,
http://www.gowister.com/hadith/abudawud/3280/
I have taken a vow to play the tambourine over you. He said: Fulfil your vow. She said: And I have taken a vow to perform a sacrifice in such a such a place,
http://www.gowister.com/hadith/abudawud/3318/
The Prophet (saws) said: Fulfil your vow, for a vow to do an act of disobedience to Allah must not be fulfilled, neither must one do something over which a human being has no control.
http://www.gowister.com/hadith/abudawud/3319/
A vow to do an act of disobedience must not be fulfilled, or to do something over which one has no control. Abu Dawud said: This woman was the wife of Abu Dharr. - Grade: Sahih (Al-Albani)
http://www.gowister.com/hadith/abudawud/3322/
Chapter: On A Man Who Takes Vows For A Thing Over Which He has no control - Narrated Abdullah ibn Abbas: The Prophet (saws) said: If anyone takes a vow but does not name it,
http://www.gowister.com/hadith/abudawud/3328/
Narrated Jabir ibn Abdullah: The Messenger of Allah (saws) would not say funeral prayer over a person who died while the debt was due from him.
http://www.gowister.com/hadith/abudawud/3349/