Aurochs Bracers 2014
Wondrous Item, uncommon, (requires attunement)
These bracers have the graven image of a bull's head on them. Your Strength score is 19 while you wear these bracers. It has no effect on you if your Strength is already 19 or higher. In addition, when you use the Attack action to shove a creature, you have advantage on the Strength (Athletics) check.
Source: Vault of Magic (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details