Don't water it at all!
Not until it's rooted and growing!
It WILL be a death sentence if for it if u do!
For that matter, I'd pull it back outta the soil, wash the dirt of and lay it on the table for a week or so until the wound scabs over, then just gently place it ON the soil not in it, and wait for those white fuzzy roots, then flick done dirt on it and slowly begin watering it, allowing it to dry thoruoghly between waterings, good luck