Hadrat Shiblî ‘rahmatullâhi 'alaih’’ [247-334, in Baghdâd] states: I studied with four hundred teachers and learned four thousand hadîth-i-sherîfs from them. Of all these hadîths, I chose one and adapted myself to it, leaving the others aside. For I saw that it would suffice for me to attain salvation and eternal happiness and that it embraced all sorts of advice. The hadîth-i-sherîf I chose is this: Our Prophet ‘sall-Allâhu alaihi wa sallam’ says to a Sahâbî: “Work for the world as much as (you will need for) the length of time you will spend here! Work for the Hereafter as much as (it will be necessary for) your endless stay there! Obey Allâhu ta’âlâ as well as you need to! Commit sins as much as you will endure (the punishment you will be given for them in) Hell!”

In the darkness of the night, pigeon in the tree
Cries out dhikr; and, oh, alas, as for me;

I am so fast asleep, shame on me! If I loved Thee,
Before pigeons, the earliest mourner I would be.