Final answer:
The exact action Zaid wanted to take is not explicitly stated, but he might have considered using strategic leverage or intelligence gathering as inferred from military tactics mentioned in the reference information.
Step-by-step explanation:
The question regarding what Zaid wanted to do upon hearing about the size of the enemy army is not explicitly answered in the provided reference information. However, it is possible to infer strategies and reactions based on the context of military tactics and responses mentioned.
For instance, reference 18 suggests a strategy of seizing something dear to the opponent to make them amenable to your will. This could imply that upon learning about the size of the enemy, Zaid might consider capturing something valuable to them to gain leverage. Reference 22 talks about preventing the enemy from fighting by discovering their plans, which hints at the importance of intelligence and strategic planning.
In summary, while the exact desired action of Zaid is not provided, the references suggest that a strategic move to gain advantage or intelligence-gathering might be his course of action.