Saint Abraham the Bulgarian is an Orthodox Christian saint venerated across most Slavonic Christian dome. His co-memoration in the Bulgarian Orthodox Church (BPC) is on 1st of April.
What is unique about this saint is that he used to be born and grown in the tradition of the Muslim (Islam) faith and by the great providence of God he converted to the true faith of Christianity.
St. Abraham of (Bulgaria), was born in Volga Bulgaria in a community of Muslim Volga Bulgars (old Bulgarians). Nowdays Volga Bulgaria is located in Tararstan Russia. The saint used to be an islamic merchant and His martyrdom for Christ happened in March 6 (according to old Church Calendar) in year 1229.
He used to live in a very complex situation, when the islamic influence of Arabs in his motherland was quite severe. St. Abraham of Bulgaria used to be a rich man for his time, he was a merchant.
Because of the trade he travelled a lot to the Byzantine Empire and the Orthodox Christian principalities. This give him an opportunity to get to know Christian faith little by little.
He was accustomed to a wordly life but still always accepted strangers and similar to the Old Testamental father of nations st. Abraham he's been very hospitable to poor people.
By Gods grace he become convinced Muslim faith does not teach a true faith to the one God, being pointed by God himself towards the right salvation way, he accepted Jesus Christ as a Lord and Saviour being baptized and hence converting to the truthful Christian faith.
His Christian baptizmal was accepted from Russian traders, who lived nearby the place of Great Bulgar.
Being baptized in the Christian faith Saint Abraham of Bulgaria not only confessed Christian faith across his fellow people, but he also led very harsh (ascetic like) life, wearing secretly below his clothes a heavy chains during his worldly travels. The profit he made from trade often he shared with the poor.Once he went for a trade to the city of Great (Bulgar) Bulgar. There he was arrested because there was a rumor, he cursed (islamic faith believed prophect) Mohammed and the muslim faith.
Muslims catched him and started convincing him to reject Christ, accusing him at a blasphemy. Abraham was not scared of muslim threats of expel and even putting to death. As Muslims failed to force him "by words" to convert back to Islam, they took him and put him in jail because of his denial of (their) Islamic faith.
In jail he was tortured but, they failed to convince him to deny Christ, seeing they have no way to convince him to accept Muslim faith once again, saint tormentors first cut his hands, then the legs and finally disgraced by his boldness and continues confession of Christ they beheaded him.
Soon afterwards the city of Bulgar was captured and burned down by the Mongols, many people in that time saw this is Gods punishment for the innocent shed blood of Abraham the Bulgar.
The local Christians took his body and buried him in the Christian cemetery of the ancient city of (Bolgar) / Bulgar.
On the place, where the saint was buried, a healing water spring emerged. The first man who received healing from this spring by Christ's grace was a muslim.
Great healing miracles happened on the saint grave. Local Christians took their relatives and bring them to the saints grave for a miracle healing and a prayer intercession of the saint. A rumour about the saints great graceous grave quickly spread and some people told about the miracle healing grave f st. Abraham to prince Georgi / (George) Vsevolodich.One year later again on 6th March 1230, the body of the saint was carried in the city of Vladimir, where the prince and his family, the Vladimirsk Bishop, the clergy and the local people received the holy relics of st. Abraham (of Bulgaria). The holy relics was kept in the local church "Dormition of Mother Mary" on 6th of March in the year of 1230.
The co-memoration of st. Abraham the Bulgarian is being observed in the Bulgarian Orthodox Church, since very ancient times.
Nowdays both Christians and Muslim celebrate the saints feast.
Interesgingly, nowdays St. Abraham the Bulgarian is venerated as a saint by both Orthodox Christians and by Muslims. Many Muslims from Turkey and other muslim countries come each year for the saints feast day to pray and ask for healing or prayer intercession to God.
Even to this very day people receive by Jesus's grace through saint Abraham the Bulgarian's prayers – a various incurable disease healings. The healings occur on the same holy spring where the saint was buried. Many people are also healed from incurrable diseases through the veneration of the incorruptable saint holy relics kept in the Church Dormition of Mother Mary.