Directions for Soaking Black-Eyed Peas
Overnight method
Add dry beans to cold water. Cover. Let stand in refrigerator overnight. Drain and discard soaking water. Replace water and cook immediately after soaking period. Longer periods of soaking are not recommended.
Quick soak method
Pour dry beans into boiling water and boil for 2 minutes. Remove from heat and allow to stand for 1 hour. Discard soaking water and proceed with cooking.
Source: USDA