Besiyata Dishmaya


Besiyata Dishmaya is an Aramaic phrase, meaning "with the help of Heaven". The acronym BS"D has become a popular term among Orthodox Jews, reproduced at the top of every written document as a reminder to them that all comes from God, including the following content, and to contextualize what is really important in the text, that without God's help, nothing can be done successfully. BS"D is not derived from any religious law of the Halakha, but it is considered an old accepted tradition.

Abbreviation

The reason for the common use of the three-letter abbreviation, בס״ד, is probably because it does not contain the letter Hei, that is used to imply the name of God, and for this reason, a page which contains the letters בס״ד without any other Torah content does not require Genizah, and thus can be thrown away without a fear of violation.
Other languages, according to Judaism, are not considered the same as the sacred language, and therefore have no such restriction.

B'ezrat HaShem

B'ezrat HaShem is a similar phrase. The acronym is B"H, which is also often read as "Baruch HaShem".
The book Toldot Yitzhak, by Yitzhak Karo, offers the meaning of this custom of writing ב״ה, at the top of every letter, with accordance to the biblical verse: "In all thy ways acknowledge Him, and He will direct thy paths"."

Cultural influence