It is the day when the earth was spread for the advantage of human beings. The phrase "Dahwul Ardh" literally means "The spread of the earth". On this day Allah (swt) spread out ALL the land on the Earth from under the Ka`bah.
In another tradition it is reported that the first Rahmah & blessing descended on this very day.... It is also reported on the authority of Imam Ali bin Moosa Al-Rida (A.S.) that tonight the two distinguished Prophets ie Prophet Ibrahim (A.S.) and Prophet Issa (A.S.) were born. Therefore it is a highly blessed night & day to be spent in prayer and supplications.
1) Observe FAST today. Many benefits have been mentioned of Fasting on this day eg Kaffarah (Penitence) for his sins of 70 years. In another tradition, if a person fasts on this day, it would be equivalent to fasting 60 months!
2) Have a Ghusl (bath)
3) Pray a 2 units prayer at the time After sunrise and before breakfast time as under:-
(i) In every unit, after the recitation of Surah Al Faatih'ah once, recite Surah 91-Ash Shams- five (5) times
(ii) After the Salaam recite the following:
There is no power and no strength except Allah's the Highest High, the Al-mighty.
O He who tolerates lapses, bear with my false steps,
O He who responds to supplications, answer to my prayers.
O He who pays attention to (all) voices, hear my cry, and have mercy on me, overlook my wrongdoings and opposition,
O Owner of might and majesty
Then recite the following dua'a, mentioned in the Misbah al-Mutahajjid, by Shaykh al Tusi
O Allah, (Who) spread the Kaa'bah, split the grain of corn, mitigates hardships, alleviates sorrows,
I ask Thee today, [one of the days, belonging to Thee, which on account of their privileges, and availability of Thy unrestricted mercy (in them), have been declared important, given preference over (other days), and exclusively specified for the believers], to send blessing son Muhammad, Thy high-minded, great-hearted and generous servant, (whom we will) meet, very soon, on the promised Day of Judgment, (who) opened that which was kept locked and shut, and invited to truth, in every walk of life; an on his "Ahl ul Bayt" (children), the pure (above board) guides, giving light to people to sustain harmony and unity, and have the authority to admit into Paradise or sent to Hell; and give me today from Thy repository of grants, neither restricted nor denied (to the needy), and let us collect ourselves and turn to repentance and recovery in good time,
O He who is called as the most favorite in exclusion to (all) others, and (who is) more generous (than others) in the matter of fulfilling hopes,
O He who gives enough,
O He who keeps His words,
O He who treats with kindness and benevolence without making a show of it, be kind and friendly towards me, make me happy with Thy favours, lend me Thy helping hand, do not leave me out unmentioned from Thy reward giving list, for the sake of those who carry out Thy commands and take care of Thy most confidential policies, and keep me safe from the fraud and deceit of materialist vicissitudes, till the day Thou shall raise the dead for the final judgment;
and let Thy close confidants be present beside me at the time when my soul departs, body disintegrates, activity ceases to operate, and my appointed time comes to an end.
O Allah keep me in mind in the long hours of agony when I take quarters in between the layers of the earth, the preoccupied forgetful put me out of their head and think no more of me,
and (I ask Thee to) settle me in the ever luxuriant land, and lodge me in a lovable comforting house, in the midst and company of Thy close friends and people who have been selected and chosen for Thy neighborhood, make my meeting with thee a blissful occasion, (so that it takes place) keep me alive adhering to good in my day to day life here, free from waywardness and indecent indulgence, before the appointed time comes to an end, (then) O Allah let me reach the cistern (center) of Thy Prophet, Muhammad, blessing of Allah be on him and on his children), and quench my thirst there, thoroughly, in plenty, gliding the wholesome water pleasantly down the throat, never to be thirsty again, never to be kept away from it once I am there, never to be driven off, and let it be my most reliable preparation, quite sufficient for the questioning session on the day when witnesses will be brought.
O Allah curse the oppressors from beginning to the end, who stirred up trouble and took possession of that which rightly belonged to Thy trustworthy representatives.
O Allah put an end to their rule, destroy their followers and agents swiftly complete their ruin, freeze their properties, and let their methods and institutions enter on the narrow road ending at a dead end.
Damn their theoreticians and their associates; O Allah, send Thy trustworthy representatives at once, wrongs done to them may be redeemed their "Qaa-im" (living representative may be given his rightful opportunity to appear, appoint him to give currency to Thy religion and to establish law and order by marking out the boundaries to end the domination of Thy enemies.
O Allah let Thy Angels form a protective right around him, give him the responsibility to turn the tables on (Thy enemies) as has been decided in the night of Qadr, till Thou gets satisfied and Thy religion is re-established through him, blooming in full growth afresh on his hands, promote his cause by making it the pure truth, and let the falsehood disappear totally discredited.
O Allah send blessings on him and on all his forefathers, and let us be his companions and familiar friends, bring us back to life so that he takes us in his service, so far as we prove ourselves his staunch supporters during his tenure.
O Allah make us reach his days of renaissance and follow his leadership, and see with our own eyes his (golden) era, send blessings on him and favour us by conveying his message of goodwill to us, peace be on him and Allah's mercy and blessing be on him.
It is desirable to recite the Ziyaarat of Imam Ali bin Moosa Al-Rida (A.S.)