After conducting a search, I found that version 6.0.1 of WhatsApp is an older version, and it's not recommended to use outdated versions as they may have security vulnerabilities.
You're looking for a way to download WhatsApp for Android, specifically version 6.0.1 repack. Here's some solid information to help you:
The official WhatsApp website provides a download link for Android devices. You can download the latest version of WhatsApp from the Google Play Store or the WhatsApp website.