Bhai Gurdas Var 27, verse 1

Layla Majnun askee chau chakki jaati

Layla-Majnun (the most famous Persian romance story), the lovers, are known throughout the four corners of the earth

Sorath Beeja gaveyai jus sughrha vaati

The story of Sorath-Beeja (still popular in Haryana) is sung in every direction

Sassi Pannun dosti huey jaat ajaati

Sassi-Pannun's love broke caste boundaries

Mahiwal no Sohni nai tardi raati

Sohni left at the ill-fated night to see her Mahiwal

Ranjha Heer vakhaneyai ohu pirm praati

Ranjha and Heer showed a great love

Peer mureedan pirharhi gavan parbhati

BUT, the love between the Guru and the disciple (read Sikh) is the highest as they sing in remembrance of each other.