I found no attribution of source, neither on the article by MEMO, nor on similar snippets posted to YouTube by other publications. Seeing only a few sentences of her speech without context made me curious to read the whole speech. Here it is: https://www.auswaertiges-amt.de/de/newsroom/-/2679468, with the paragraphs in question translated (Sorry for not translating more, I don't have DeepL Premium):

We have made it just as clear - and this is not a contradiction, but a complement - that international humanitarian law and Israel's right to exist go hand in hand. This is what the German raison d'état stands for. That is why we have stated it clearly time and again: Self-defense naturally means not only attacking terrorists, but destroying them. That is why I have made it so clear that when Hamas terrorists hide behind people, behind schools, then we are entering very difficult areas. But we will not duck away from them. That's why I made it clear to the United Nations that civilian places can also lose their protected status because terrorists abuse it. Germany stands by this, for us it means Israel's security. And because the resolutions have been mentioned: We are pursuing a policy of action. In view of the resolutions, which state that humanitarian aid must reach Gaza, that the two-state solution can be the only goal if we really want security for the entire region, but which also contain some sentences that Germany does not share, we cannot say: we are closing our eyes, we are not finding the strength to differentiate, as a mother of a hostage who has been killed finds in the most difficult hour of her life.