Unable to link the following libraries: contracts/IterableMapping.sol:IterableMapping

I am using HardHat Development Environment when I try to Deploy through npx hardhat I am getting below error message.

npx hardhat run --network testnet scripts/deploy.js
NomicLabsHardhatPluginError: The contract ADAcash is missing links for the following libraries:
* contracts/IterableMapping.sol:IterableMapping

Learn more about linking contracts at https://hardhat.org/plugins/nomiclabs-hardhat-ethers.html#library-linking

    at collectLibrariesAndLink (D:\sathish\BSC_Heal\ADACash_Sample\node_modules\@nomiclabs\hardhat-ethers\src\internal\helpers.ts:228:11)
    at getContractFactoryByName (D:\sathish\BSC_Heal\ADACash_Sample\node_modules\@nomiclabs\hardhat-ethers\src\internal\helpers.ts:119:32)
    at main (D:\sathish\BSC_Heal\ADACash_Sample\scripts\deploy.js:17:19)

I am using Binance Smart Chain (BEP20) testnet. I tried to give link for IterableMapping.sol:IterableMapping. But I am not able to do.
Can any one please help me to resolve this issue.

Hey @sundar.sat84 can you show how you are deploying it? Show the deploy script please