This is the one I used:
POSTPARTUM HERBAL BATH
The postpartum herbal bath is wonderfully healing for both mom and baby. It also provides pain relief! The recommended herbs have astringent and antiseptic properties which soothe and heal sore bottoms, help dry up the baby's cord stump, and prevent infections. You and your baby should take one bath per day for the first five days. If you have stitches or any lacerations, you may want to take two baths per day for two to three weeks, or until healing is complete.
If purchasing herbs by the pound, 1/4 pound of each herb should yield a sufficient number of baths in most circumstances. For episiotomy recovery and more severe tears, additional baths may prove beneficial.
Boil approximately one gallon of water or just use a large stock pot. Once the water boils, turn off the heat and add a large handful of each herb or the contents of one pre-mixed bag to the pot (siblings love to help with this!). Cover and let steep for at least one hour (longer is better). When ready, pour the herb water directly into the tub through a strainer and discard the herbs. For a homebirth, your herb bath can be made in early labor so that it will be nice and strong when you're ready for it. Upon return home from a hospital or birth center birth, have the bath as a homecoming ritual. Light some candles. Relax. Enjoy!
The mixture can sit at room temperature for up to 24 hours. If not used within 24 hours, strain out the herbs and refrigerator the fluid. It will keep for 2-3 days. You can brew up the next batch just after the current bath. Then, whenever you're ready for the bath, it's ready for you!