Baba Ji was born in 1682 A.D. in village Pahuwind, district Amritsar. The name of his father was Bhagta and his mother's name was Jeeuni. He had a great interest in recitation of Gurbani, Keertan and Satsang right from the childhood. Whenever he had time he would practise horse riding, skill at arms i.e. learn to fight and tent pegging He was very softspoken and bore a good moral character. The people of his territory used to pay him a great regard for his religious and pious leanings.
In 1704 A.D., when the tenth Guru Sri Guru Gobind Singh dictated the holy scripture of Sri Guru Granth Sahib at Damdama Sahib, Sabo Ki Talwandi, Baba Deep Singh used to make arrangement for the paper, ink and reed-pens with great zeal and zest. On completing this epoch-making task, when Sri Guru Gobind Singh went to Hazoor Sahib Nanded, Baba Deep Singh accompanied him. At the time when at Hazoor Sahib Sanded, the Guru bestowed the Guruship to Sri Guru Granth Sahib, Baba Deep Singh was present there as one of the five beloveds (Panj Piaras); the names of the others being Bhai Dharam Singh, Bhai Har Singh, Bhai Santokh Singh and Bhai Gurbakhsh Singh Shaheed (the martyr). The Guru performed the Ardas (prayer) in the presence of these five beloved ones. Afterwards on the orders of Sri Guru Gobind Singh, Baba Deep Singh started teaching the Sikhs the correct recitation of Sri Guru Granth Sahib and explained the correct meaning of the same. He also taught the Sangat how to pay full 'espect to the Saroop of Sri Guru Granth Sahib. The proper service to this sacred scripture was also taught by him. He used to prepare pothis (small sacred books of Gurbani) which were sent at different places. He preached a lot of Gurbani in a very short span of time. Baba Deep Singh helped Baba Banda Singh Bahadur in every battle and campaign from 1708A.D. to 1715 A.D.
In 1716 A.D., Baba Ji wrote four copies of the sacred Granth in Gurmukhi (Punjabi. anguage). These four different sacred copies were sent to four Takhts — Sri Akal Takht Sri Amritsar, Takht Sri Harmandir Sri Patna Sahib (Bihar), Takht Sri Kesgarh Sahib Sri Anandpur Sahib, Takht Sri Abichal Nagar Sachkhand Sri Hazoor Sahib (Maharashtra).
Baba Deep Singh was not only the scholar of Gurmukhi, but he was quite proficient in Arabic and Persian as well. He is the very first Sikh scholar of the Panth, who wrote the sacred Granth in Arabic and sent it to Arab. The people of Arabic countries pay full obeisance to that Granth. They have faith in this form of the Granth and the wishes of the people are fulfilled after an Ardas before this Granth which is written in Arabic alphabet. This unique contribution of Baba Deep Singh is for the betterment of the people.
Great scholar, philosopher and saint-soldier Baba Deep Singh commanded a great respect among the Sikh Qaum (nation).
When Nawabhood was bestowed upon Nawab Kapur Singh, he, first of all put it at the feet of five Sikhs. Baba Deep Singh was one of these five Sikhs.
After the demise of Dewan Darbara Singh, two Jathas of the Sikhs were formed namely, Tarna Dal and Budha Dal. Tarna Dal was further divided into five and five Jathedars (group leaders) were made. Baba Deep Singh led one of these Jathas. In his Jatha two thousand horse riders (cavalrymen) would be every ready. When Massa Rangar did an act of sacrilege to the Golden Temple, Sri Harmandir Sahib, it was Jathedar Budha Singh of the Jatha of Baba Deep Singh, who sent Bhai Sukha Singh and Bhai Mehtab Singh. They beheaded Massa Rangar, which was put before Baba Deep Singh. When Baba Deep Singh heard the news that Jahan Khan was desecrating the holy tank of Sri Amritsar Sahib, he could not control himself. Baba Ji took with him five hundred warriors. He put on the clothes of yellow colour (Kesri Rang). He adorned himself with all the customary weapons. He took the double-edged sword in his hand and had a holy dip in the holy tank of Sri Tarn Taran Sahib. He offered the sacred pudding to the Sangat and made an Ardas (prayer) before Sri Guru Granth Sahib. With the slogans of 'Bole So Nihal' he started advancing towards Sri Amritsar Sahib. He offered his final prayer "Until and unless I make free the Golden Temple, Sri Harmandir Sahib from the cruel hands of the enemy, I will not lay down my life."
What is nectar ? This is that nectar
of which even a drop if goes in the body of someone
That one will come into the battle-field
with sword even after death;
If a drop goes inside the eye of somebody
The death cannot dare to stare that eye.
The both the armies faced each other in the battle-field of Chabba. The whole ground became red with the blood. There was a grim and bitter fight between Baba Ji and Yakoob Khan. Baba Ji struck him with his mace with such a force that he breathed his last. Seeing the death of Yakoob Khan, Jahan Khan came forward himself. When Baba Ji and Jahan Khan were fighting, both struck each other with their respective weapons. This way, both were beheaded. Seeing the head separated from the body, a Sikh said, "Baba Ji! you had made an Ardas (prayer) that you will put your head at the altar of Sri Guru Ramdas, but what has happened now ?"
Hearing this, Baba Ji put his head on his left hand. He again took the double-edged sword into his hand and started killing the enemies again. Those who saw it were wonder- struck. The enemy force started to flee. They were saying that the general of the Sikhs was fighting even when he was beheaded. This way a scare was created among them and they started leaving the battle-field.
Fighting this way, Baba Ji reached inside the complex (Parkarma) of Sri Harmandir Sahib. The Sikhs shouted the slogans of victory. Baba Ji made an Ardas with full reverence and put his head in altar of Sri Guru Ramdas Ji. Then he departed for his heavenly abode, the Sachkhand.
Cut the heads; fall down there are
innumerable arms and heads
Go forward like the man perfect
The head will be put at destination.