Allah Subhanahu wa Ta’laa blessed His last Prophet’s with so many blessings in which are some virtues days and nights like layla tul qadar in Ramadan , 15th of Sha’baan , 9th and 10th of Muharram and the first 10 days of Dhul Hijjah . In these days Allah has blessed the Believers with oppurtunties to multiply their rewards . These are so sacred days that Allah swears on oath by them in Quran in surah Al-fajar ;
وَالۡفَجۡرِ۔ ۱ وَلَيَالٍ عَشۡرٍ۔۲
By the break of Day . By the Nights twice five . verse ; 1,2 .
— English Translation (Yusuf Ali)
All scholars of Quran are agreed that these nights are the first ten nights of Dhul Hijjah . Imaam Bukhari narrates from Syedna Ibn A’bbaas that the Prophet pbuh said , ” There are no days on which righteous deeds are more beloved to Allah than these ten days ” . They ( the companions ) said , ” Not even jihaad for the sake of Allah ? ” He said , ” Not even jihaad for the sake of Allah , unless a man goes out himself with all his wealth and comes back with nothing . ”
The Prophet pbuh also said , ” There are not any days greater nor any days in which deeds done in them are more beloved to Allah than these ten days . So increase in them the saying of Tahleel ( لا الہ الا اللہ ) , Takbeer ( اللہ اکبر ) , Tahmeed ( الحمد للہ) . “
Things to do in these days ;
1- Saying Takbeer loudly
The Prophet pbuh and his companions pronounced Takbeer loudly all the time and even in markets in these days . This Takbeer is as following ;
اللہ اکبر، اللہ اکبر، اللہ اکبر ، لا الہ الا اللہ اکبر ، اللہ اکبر ، اللہ اکبر ، و للہ الحمد
2- Performing Hajj and Umrah if possible
3- Fasting , specially on 9th Dhul Hijjah ( yom e Arafah )
4- Sincere repentance by saying Astghfaar
5- Praying nwaafil
6- Recitation of Quran
7- Spending time in zikar
8- Offering Eid Prayer
9- Offering Sacrifice ( udhiyah )