" Whether a friend is with you or away from you, continue loving him. 'Umar ibn Ahmad recites a poem of Yazid al-Muhallabi:

If you part from us, may God lead You
to beautiful places.
When you come to us, you are always welcome.
When you go, do not fear that we will ever forget you.
When you come, do not feel that we will ever have
enough of you.

(p. 95) "

― , The Way of Sufi Chivalry