Which of the following led away a section of the Muslims army when preparations were on for the battle of Uhud?

Abdullah b. Ubayy led away a section of the Muslim army when preparations were on for the battle of Uhud. He was the leader of the hypocrites who pretended to be Muslims but secretly harbored disbelief and ill will towards Prophet Muhammad (S.A.W) and the Muslim community. Abdullah b. Ubayy convinced a group of Muslims to abandon their posts just before the battle began, which weakened the Muslim army's position and led to their defeat.