The Brigades of the Martyr Izz el-Deen al-Qassam, military wing of Islamic Resistance Movement of Hamas, confirmed the decision to respond with revenge for the martyrs and the great leader Mahmoud Mabhouh has been made, God willing. We are guardians of the blood, our retribution is coming, and your mission is to live in panic and terror and we will keep you obsessed with fear.
The Qassam Brigades will determine the appropriate mechanism for implementation of our vengeance. We will not tell you how and where and when you will receive our fire of anger, and our masterly performance will be in the time and place of our choosing.
We are very aware of what we say, we do not speak empty words or gestures, but the words are a reflection of what will come. today you hear our words, and tomorrow you will see a fire and bullets and acts of reality, so long as you you take the path of treachery, murder and criminality.
I do not understand why you return throughout history to respond with the assassinations of al-Qassam Brigades leaders and the leaders of our people and Mujahideen. ...[the statement goes through the history of Israeli directed killings of major Hamas leaders, saying that Hamas always came back more powerful and with more innovative methods of killing than before.]
This is less than half the statement, which you have to admire for its almost poetic language of death and terror. In Arabic, they are not shy at all about making threats. You won't find this in the English-language Qassam website, meant more for Western eyes.