وَإِن يَكُن لَّهُمُ ٱلْحَقُّ يَأْتُوٓا۟ إِلَيْهِ مُذْعِنِينَ
Important Words:
مذعنین (running in all submission) is active participle from أذعن which is derived from ذعن. They say أذعن له i.e. he was or became quick in obedience to him or it; he was or became humble to him; he confessed to him. The Quranic words یأتوا الیه مذعنین mean, they come quickly in obedience (Lane & Aqrab).