Sukhmani Sahib was composed by Guru Arjan around 1602 before he compiled the Adi Granth. The Guru compiled it at Ramsar Sarovar (Sacred Pool), Amritsar which at the time was in thick woods.
Prominent Sikh saint Baba Nand Singh of Nanaksar group (19th century) and his band members would sometimes tell Sikhs to recite Sukhmani Sahib twice daily alongside that the Sant would also have Sikhs do content Akhand Path (constant reading) of Sukhmani Sahib go on which continues to this day.