Do you mean this part:

20. Hamas believes that no part of the land of Palestine shall be compromised or conceded, irrespective of the causes, the circumstances and the pressures and no matter how long the occupation lasts. Hamas rejects any alternative to the full and complete liberation of Palestine, from the river to the sea.

Or perhaps this part:

25. Resisting the occupation with all means and methods is a legitimate right guaranteed by divine laws and by international norms and laws. At the heart of these lies armed resistance, which is regarded as the strategic choice for protecting the principles and the rights of the Palestinian people.

Oh wait, there’s more:

27. A real state of Palestine is a state that has been liberated. There is no alternative to a fully sovereign Palestinian State on the entire national Palestinian soil, with Jerusalem as its capital.

They define “Palestinian soil” earlier:

2. Palestine, which extends from the River Jordan in the east to the Mediterranean in the west and from Ras Al-Naqurah in the north to Umm Al-Rashrash in the south, is an integral territorial unit. It is the land and the home of the Palestinian people. The expulsion and banishment of the Palestinian people from their land and the establishment of the Zionist entity therein do not annul the right of the Palestinian people to their entire land and do not entrench any rights therein for the usurping Zionist entity.

They have only 1 segment that even hints that they might accept a 2 state solution:

However, without compromising its rejection of the Zionist entity and without relinquishing any Palestinian rights, Hamas considers the establishment of a fully sovereign and independent Palestinian state, with Jerusalem as its capital along the lines of the 4th of June 1967, with the return of the refugees and the displaced to their homes from which they were expelled, to be a formula of national consensus.

Which is pretty hard to take at face as an acceptance of a two state solution when it literally says in the sentence before that that they reject any alternative other than “from the river to the sea” and in the sentence after completely reject the Oslo accords.