This is a Du"a for the protection of the 12th Imam al-Mahdi (May God hasten his reappearance). It is recommended that believers recite it often during the ghaybat of the Imam.
In the name of Allah, the Beneficent, the Merciful.
O Allah, bless Muhammad and the family of Muhammad.
O Allah, be, for Your representative,
the Hujjat (proof), son of Al¬Hasan,
Your blessings be on him and his forefathers,
in this hour and in every hour,
a guardian, a protector, a leader,
a helper, a proof, and an eye.
until You make him live on the earth,
in obedience (to You),
and cause him to live in it for a long time.
O One who directs all the affairs,
O One who will raise those who are in the graves,
O One who makes the rivers flow,
O One who softened the iron for Dawood,
Bless Muhammad and the family of Muhammad,
and do for me . . . (ask for your wishes),
in this night, this night.