" Don’t forget the days of blood, O friend

In the midst of your happiness remember to shed a tear for us

The hunter has torn away every single flower

Do plant a flower in the desert garden dear friend

Having fallen to bullets we slept in Jallianwala Bagh

Do light a lamp on this lonely grave O friend

The blood of Hindus and Muslims flows together today

Do soak your robe in this river of blood dear friend

Some rot in jails while others lie in their graves

Do shed a few tears for them O friend..."

 In the poem sung after the Jallianwala Bagh massacre, which line according to you, reflects India's essential unity.