There is a discussion in the Gemara (Menahoth 32b) as to whether one is permitted to sit on a bed/couch which has...
Wednesday, October 26, 2011/Tashri 28, 5772

Neither a vow nor an oath may be annulled before the time that the vow or oath actually comes into effect....
Wednesday, January 12, 2011/Shebat 7, 5771