Besiyata Dishmaya

Besiyata Dishmaya (Aramaic: בסיעתא דשמיא) is an Aramaic phrase, meaning "with the help of Heaven". The acronym BS"D (Mostly written in Hebrew: בס"ד) has become a Jewish term amongst several orthodox religious denominations, reproduced at the top of every written document (beginnings of correspondences, letters, notes, etc.) as a reminder to them that all comes from God, including the following content and to contextualize what's really important in the text, that without God's help we can do nothing successfully. BS"D is not derived from any religious law of the Halakha but it's considered an old accepted tradition.