The word(s) "bottom" appears 3 time(s) in 3 verse(s) in Quran in Saheeh International translation.

(1) Said a speaker among them, "Do not kill Joseph but throw him into the bottom of the well; some travelers will pick him up - if you would do [something]."

(2) So when they took him [out] and agreed to put him into the bottom of the well... But We inspired to him, "You will surely inform them [someday] about this affair of theirs while they do not perceive [your identity]."

(3) Indeed, it is a tree issuing from the bottom of the Hellfire,