Learn גמרא דף כ: “א”ר יצחק בר אדא until דף כא. “אמר רב ירמיה בר אבא (sixteen lines from top of the Amud)
Questions:
If it is prohibited to draw water from the well for people to drink why is it only permitted to set up פסי ביראות surrounding a well of clean spring water that is fit for human consumption?
Learn תוס’ דף כא. “מידי
Clarify the two different explanations of Tosfos
See מהרש”א
https://hebrewbooks.org/pdfpager.aspx?req=14312&st=&pgnum=268
https://hebrewbooks.org/pdfpager.aspx?req=14312&st=&pgnum=269
Learn תוס’ יח. “בור לחוד
Was the takana of פסי ביראות instituted primarily to help provide water to animals or for people?
Learn רשב”א בעינן
https://hebrewbooks.org/pdfpager.aspx?req=37275&st=&pgnum=24
https://hebrewbooks.org/pdfpager.aspx?req=37275&st=&pgnum=25
See ריטב”א “ופרקינן
https://hebrewbooks.org/pdfpager.aspx?req=37287&st=&pgnum=33