Birkhat haGomel (Blessing of Gratitude) is commonly said after recovering from serious illness or delivering a baby, but can also be recited in appreciation for completing a dangerous journey. It's usually recited in a group of at least 10 other adults who can offer the response. 

First, one person offers this blessing:

Baruch ata Adonai, Eloheinu melech ha-olam, ha-gomel l’chayavim tovot she-g’malani kol tov.

Blessed are You, Lord our God, ruler of the world, who rewards the undeserving with goodness, and who has rewarded me with goodness.

After the recitation of this blessing, the community responds:

Mi she-g’malcha kol tov, hu yi-g’malcha kol tov selah.

May he who rewarded you with all goodness reward you with all goodness for ever.