To indicate origin or where somebody is from

Are you talking about the verb "Ser"?

If you were, the verb "ser" used to illustrate identity and origin. There are many different forms of the verb "ser" such as: yo, tu, el, ella, usted.

in the dark you call me from the darkness you called me i recognized your voice you recognized my neighbor for here i said you where you are dad i do not see you here i am here and i am afraid you said not my son wait i have you where are you this dark i do not see anything i have fear do not be afraid, son, right now, i'm coming soon, papa, i'm waiting for you, a father cries out to his son