Hamas, as part of its revised 2017 charter, rejected "any alternative to the full and complete liberation of Palestine, from the river to the sea", referring to all areas of former
Mandatory Palestine and by extension, the end of Jewish sovereignty in the region.
[12][13][24] Islamic Jihad declared that "from the river to the sea – [Palestine] is an Arab Islamic land that [it] is legally forbidden from abandoning any inch of, and the Israeli presence in Palestine is a null existence, which is forbidden by law to recognize.
[14] Islamic supporters have utilized a version stating "Palestine is Islamic from the river to the sea", with certain Islamic scholars[
who?] declaring that the
Mahdi – a redemptive apocalyptic figure central to
Islamic eschatology – will declare "Jerusalem is Arab Muslim, and Palestine – all of it, from the river to the sea – is Arab Muslim."
[36][37]
The phrase has been linked to Hamas since their founding in 1988 with their founding charter seeking "to confront the Zionist invasion and defeat it", however the phrase did not feature in Hamas's official positions until 2017.
[38] The first usage of the phrase was as part of its 2017 revised platform where they state "Hamas rejects any alternative to the full and complete liberation of Palestine, from the river to the sea [...] along the lines of the 4th of June 1967".
[39][40][41]
https://en.wikipedia.org/wiki/From_the_river_to_the_sea#Use_by_militant_groups