Sat Śri Akāl (Gurmukhi: ਸਤਿ ਸ੍ਰੀ ਅਕਾਲ, pronounced [sət sɾiː əkɑːl] ⓘ) is a jaikara (lit.
The full call is as follows, "Bole So Nihal, Sat Sri Akal" ("Shout Aloud in Ecstasy; Truth is the Timeless One").
As the term is historically the second half of the Sikh war cry, "Bole So Nihal, Sat Sri Akal", and is still used in the same way.
As per the Sikh Rehat Maryada, or Code of Conduct, Amritdhari Sikhs greet each other with "Waheguru Ji Ka Khalsa Waheguru Ji Ki Fateh", meaning "The Khalsa belongs to the Lord God!
It was also used a lot on the puratan Sikh shastars normally found on the blade or inside the hand guards.