Twins killing in Nigeria was one of the sad occurrences that befell Nigerian back then before it was stopped. Mary Slessor was born on December 22, 1848, in Aberdeen, Scotland, in the United Kingdom. Her fatherhood was drunk, but her mother forced her to go to church from an early age. Mary gave her life to Jesus and developed a great interest in religion and joined a local missionary church, teaching the poor and the children to listen to the teaching of their Sunday School at 11 years old.  Mary Slessor was an enthusiastic worker in various missions and became a Scottish missionary in Calabar, Nigeria. She was pious and determined to do God's work and went to live among the Efik and Okoyong who lived near the Efiks in Calabar.

However, he learned to speak Efik, the dialect of the inhabitants of Calabar and spoke it fluently. He preached the Gospel in the village of Ekenga in Calabar and when he went to preach for the first time to Calabar. The crowd came out to listen to her, and she condemned her superstitious principle and barbaric murder of twins and eaten human flesh on earth. She brought a word of light to souls who were in darkness, love and kindness taught the villagers and the king loved his brave spirit and permitted him to live in the village.

Then Slessor went to preach the burning gospel of Christ and lived on native food. She sat in a mud house in the ground for the sake of the Gospel. She challenged the tradition of the people. And God used Mary Slessor to work miracles in the village. She heals the sick, prays for a dying leader, and the leader is healed. But the villagers called him a magician and a juju woman

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