'Mary' did not want to reveal her real name for fear of attack. She said her 15-year-old daughter was one of around 276 girls taken by militants in April 2014.
Boko Haram kidnapped them from a school in Chibok in Nigeria's Borno state.
Mary told Breitbart News that she had been given no help since her daughter's disappearance: "We don't have any support from anywhere, but God is there to support us and he's there to assist us.
"And I have faith in him that, as we are crying [and] praying for the girls every minute, every second, every hour, we will rejoice again one day when he wins the battle" to liberate the girls.
"The God of Christians is alive and he's there on the throne and he's working on it and he will keep working on it.
"We have faith in him. As he has saved the children of Israel from the land of Egypt, that's how he will see us through."
She appealed for people to pray for the girls, who she fears will be suffering psychological disorders after more than two years in captivity.
It is unknown where the girls are being held or how many are still alive. Officials suspect many of them were forced to marry Islamic jihadists or were sold as slaves.
