Bhai Sati Das (died 1675) along with his elder brother Bhai Mati Das is one of the greatest martyrs in Sikh history. Bhai Sati Das and his elder brother Bhai Mati Das belonged to the family of Chhibber Brahmins and were followers of ninth Sikh Guru, Guru Tegh Bahadur. Bhai Sati Das, Bhai Mati Das and Bhai Dyal Das were all executed at kotwali(police-station) near the Sunehri Masjid in the Chandni Chowk area of Old Delhi, under the express orders of emperor Aurangzeb.
Bhai Sati Das was a Brahmin of Mohyals clan of the Rangrete clan. He belonged to the village of Karyala, in the Jhelum District in Punjab (Pakistan), about ten kilometres from Chakwal on the road to the Katas Raj Temple Complex. The village stands on the top of the Surla hills. This part of the country is known as Dhani meaning rich. A few kilometres away are the Salt Mines and coal mines of Dandot. The Katas lake is beautiful. Legend connects it to the Mahabharata. It is believed to be the very pool, where the Pandava, Yudhishthira was tested by his father, Lord Yama/Dharma in the form of a Yaksha. A great Hindu fair used to be held there up to 1947.
Sati Das was the son of Hira Nand, a disciple of Guru Har Gobind, under whom he had fought in many battles. He survived the Guru, and a little before his death he had entrusted his two sons, Mati Das and Sati Das to the care of Guru Har Rai, who had assured the dying man of his full attention and help. Both the lads remained attached to the Guru's family at Kiratpur. When Guru Har Krishan was summoned to Delhi by Aurangzeb, both the brothers, Mati Das and Sati Das, were present in his entourage along with Dyal Das and Gurditta, a descendant of Bhai Budha (different from Baba Gurditta, the son of Guru Hargobind, brother of Guru Teg Bahadur and father of Guru Har Rai).