As delivered by Ismail Haniyeh:
We say today, explicitly, so it cannot be explained otherwise, that the armed resistance and the armed struggle are the path and the strategic choice for liberating the Palestinian land, from the [Mediterranean] sea to the [Jordan] river, and for the expulsion of the invaders and usurpers [Israel] from the blessed land of Palestine. The Hamas movement will lead Intifada after Intifada until we liberate Palestine - all of Palestine, Allah willing. Allah Akbar and praise Allah. We say with transparency and in a clear manner, that Palestinian reconciliation - and all sides must know this - cannot come at the expense of [our] principles, at the expense of the resistance. These principles are absolute and cannot be disputed: Palestine - all of Palestine - is from the sea to the river. We won't relinquish one inch of the land of Palestine. The involvement of Hamas at any stage with the interim objective of liberation of [only] Gaza, the West Bank, or Jerusalem, does not replace its strategic view concerning Palestine and the land of Palestine.
You can see and hear him saying all that here. Next time you hear some Western leftist (verkrappt branch) mouthing off with the slogan 'from the river to the sea', all the while adding assurances about a secular-democratic state for Palestine, you might draw his or her attention to Haniyeh's words, 'expulsion of the invaders and usurpers from the blessed land of Palestine'.