Potion of weakness(1:30) is used to reduce melee damage.
In this Brief Guide we will tell you how to make Potion of Weakness (1:30) in the Minecraft Survival. To get that you first need to make a Water Bottle and Fermented Spider Eye. Then you have to use the Brewing Stand to make the required potion.
Potion of Weakness(1:30) using Brewing Stand
Go towards the brewing stand to use it. Put a fermented spider eye in the upper box and water bottle in the lower box of the brewing stand and wait for a few moments until you get a potion of weakness(1:30) in place of the bottle of water.
Add this potion into your inventory to use later.
You can see a potion of weakness(1:30) in the image below.