ਸਹਜ ਗੁਫਾ ਮਹਿ ਆਸਣੁ ਬਾਧਿਆ ॥ ਜੋਤਿ ਸਰੂਪ ਅਨਾਹਦੁ ਵਾਜਿਆ ॥ Bhai Gurpreet Singh Jee Jalandhar
This shabad sasoo tey piri keenee vaakhi is by Guru Arjan Dev in Raag Asa on Ang 370 of Sri Guru Granth Sahib ji