Some among that generation even wanted to war against God in heaven (Talmud Sanhedrin 109a). They were encouraged in this undertaking by the notion that arrows that they shot into the sky fell back dripping with blood, so that the people really believed that they could wage war against the inhabitants of the heavens (Sefer ha-Yashar, Chapter 9:12–36). According to Josephus and Midrash Pirke R. El. xxiv., it was mainly Nimrod who persuaded his contemporaries to build the Tower, while other rabbinical sources assert, on the contrary, that Nimrod separated from the builders.