Whether a vow applies to something that doesn't yet exist

How many times is considered "too many" for making a vow to prohibit others from benefiting?

How many people are required to be present to declare something ownerless?

Can a person make an object or business ownerless for only one day?

The difference between different types of gifts that one plans to get back in return with application to sale of chametz on Pesach and fields in Israel during Shemitta

Does Shemitta produce and the land become automatically owner less or only through a verbal declaration?

The deep commentary of the Maharal on healing from illness

Where does one insert the prayer for individuals who are sick in the silent amida?

Praying for those who are ill- what kind of prayer is allowed?

What did the Rabbis mean that to receive prophecy a person must be a gibor and and an ashir? was this literal? metaphorical?