(1) 13th, 14th and 15th of Rajab, Shaa’-baan and Ramzan are know as “Ayyaam-e-Beez” (the days of surpassing splendour) . Imam Jaa’-far bin Muhammad As Saadiq (A.S.) had said: Whoso prays during the nights of “Ayyam Bayz”, in fact, stands at the door of superabundant favours, bounties and benefits available in these months
(2) It is highly desirable to observe fast on 13, 14 and 15, have a bath each day, and give alms in the way of Allah.
(3) In the night of “Ayyam Bayz” pray a 12 Rak-a’t Namaz as under
(i) In the night of the 13th pray 2 Rak-a’t:
In each Rak-a’t recite Soorah Al Faatih’ah, Soorah Al Yaa Seen, and Soorah Al Mulk.
(ii) In the night of the 14th pray 4 Rak-a’t: in 2 sets of 2
2 Rak-a’t, each exactly as (i),
(iii) In the night of the 15th pray 6 Rak-a’t: in 3 sets of 2 of
2 Rak-a’t, each exactly as (i),
(4) In the night of 15th:
(i) Recite Ziyaarat of Imam Husayn bin Ali (A.S.)
(ii) Pray the following 12 Rak-a’t Namaaz in 6 sets of 2 Rak-a’t each:
In every Rak-a’t recite:
Soorah Al Faatih’ah 4 times
Soorah Al Ikhlaas 4 times
Soorah Al Falaq 4 times
Soorah Al Kaafiroon 4 times
Soorah Al Naas 4 times
Soorah Al Qadr 4 times
Aayaatul Kursee 4 times
Tasbihaat ul Arbaa’ 4 times
After every Salaam recite 4 times:
Allah! Allah! My Lord! I associate not anything with Him. I choose no protecting friend beside Him. That which Allah wills (come to pass). There is no might and no strength save in Allah, the Hightest, the Almighty
ALLAAHU ALLAAHU RABBEE LAA USHRIKU BIHEE SHAY-AN WA LAA ATTAKHID’U MIN DOONIHEE WALIYYAA WA MA SHAAA-ALLAAHU LA QUWWATA ILLAA BILLAAHIL A’LIYYIL A’Z’EEM
(5) On the 15th day
(i) Pray Namaaz of Salman Farsi. A 10 Rakat Namaaz Pray in 5 sets of 2 rakat each. In every Rakat recite Sura Faatihah , once ,Sura Ikhlaas 3 times & Sura Kafiroon 3times.
Then after salaam raise both your hands towards the sky & recite
LAA ILAAHA ILLALAAHU WAH’DAHOO LAA SHAREEKA LAHOO LAHUL MULKU WA LAHUL H’AMDU YUHY’EE WA YUMEETU WA HUWA H’AYYUN LAA YAMOOTU BI YADIHIL KHAYR WA HUWA A’LAA KULLI SHAY-IN QADEER
There is no god save Allah,no one other than him;sovereignity belongs to HIM .all praise is for HIM alone,gives life,puts to death,(because)HE is everliving ,Immortal;in His hand is the goodHe is able to do all thing
ALLAAHUMMA LAA MAANI-A’LIMAA AA’-T’AYTA WA LAA MUA’T’IYA LIMAA MANAA’-TA WA LAA YANFA-U’D’AL-JADDI MINKAL JADD
O my Allah there is no obstacle when thou gives , and there is no access to anything when thou puts a stop; there is no profit in exerting ones self in a matter when thou “ looks the other way”
& recite the following:
The one true God! Single! Unique! The eternally besought! He did not choose any associate nor a son
ILAAHAN WH’IDAN AH’ADAN FARDAN S’AMADAA LAM YATTAKHID’ S’AAH’IBATAN WA LAA WALADAA
(ii) Recite Ziyaarat of Imam Husayn bin Ali (A.S.) & this Special Ziarat
(iii) Pray 4 Rak-a’t Namaaz in 2 sets of 2 Rak-a’t each.
After Salaam recite the following dua’a: MP3
O my Allah! O He who puts the proud tyrants to shame! O He who glorifies the faithfuls! Thou was my choice at once when I came across many schools of thought (religions), Thou brought me into existence, a favour to me, though Thou was able to dispense with my creation, not needing me at all.
If not for Thy mercy I am of those who perish. Thou makes available reliable support to have an upper hand over my adversaries. If not for Thy help I am of those who shatter and break into pieces.
O He who sends forth mercy from its permanent self-generating origin, and brings out blessing from its depository.
O He who has reserved for Himself that which is the highest, and the loftiest, so His intimate friends, on account of His might, vie in honour and glory. O He before whom bend low the rulers, their necks burdened with the yoke of disgrace and abasement, panic-stricken, scared stiff, in awe of His absolute power.
I beseech Thee in the name of Thy Supreme Being that derives its meaning from Thy timeless eternal greatness, I beseech Thee in the name Thy timeless eternal Greatness that derives its meaning from Thy omnipotent authority; I beseech Thee in the name of Thy omnipotent authority with which Thou occupied the Arsh, and created all that which has been created by Thee; so they, unto Thee, are very obedient, to send blessing on Muhammad and on the people of his house.
ALLAAHUMMA YAA MUD’ILLA KULLI JABBAAR YAA MU-I’ZZAL MOO-MINEEN ANTA KAHFEE H’EENA TUA’-YEENIL MAD’AAHIB WA ANTA BARI-U KHALQEE RAH’MATAN BEE WA QAD KUNTA A’N KHALQEE GHANIYYAA WA LAW LAA RAH’MATUKA LA-KUNTU MINAL HAALIKEEN WA ANTA MU-AYYIDEE BIN NAS’RI A’LAA AA’-DAAA-EE WA LAW LAA NAS’RUKA IYYAAYA LA-KUNTU MINAL MAFZ”OOH’EEN YAA MURSILAR RAH’MATI MIN MA-A’ADINIHAA WA MUNSHI – AL BARAKATI MIN MAWAAZ”I-I’HAA YAA MAN KHAS’S’A NAFSAHOO BISH SHUMOOKHI WAR RIF-A’TI FA-AWLIYAA-UHOO BI-I’ZZIHEE YATA-A’ZZAZOON WA YAA MAN WAZ”A-A’TLAHUL MULOOKU NEERAL MAD’ALLATI A’LAA AA’-NAAQIHIM FAHUM MIN SIT’AWAATIHEE KHAA-IFOON AS-ALUKA BI-KAYNOONIYYATIKAL LATISH-TAQAQTAHAA MIN KIBRIYAAA-IKA WA AS-ASLUKA BI-KIBRIYAAA-IKAL LATISH-TAQAQTAHAA MIN I’ZZATIKA WA AS-ALUKA BI-I’ZZATIKAL LATIS-TAWAYTA BIHAA A’LAA A’RSHIKA FA-KHALAQTA BIHAA JAMEE-A’ KHALQIKA FAHUM LAKA MUD’-I’NOON AN TUS’ALLIYA A’LAA MUHAMMADIN WA AHLI BAYTIHEE
source : http://duas.org