The Prophet (ﷺ) said: The greatest day in Allah’s sight is the day of sacrifice (Following Prophet  Ibrahim (Abraham) Path and Faith to  love and obey Allah) and next the day of resting (Days of Mina where Muslims follow  the Prophet Ibrahim  (Abraham), His Wife Hājar (Hagar) and His Son Ismail (Ishmael) in disobeying the devil plot  by stoning him and staying firm in the faith) “Sunan Abi Dawud

 عَنْ عَبْدِ اللَّهِ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏”‏ إِنَّ أَعْظَمَ الأَيَّامِ عِنْدَ اللَّهِ تَبَارَكَ وَتَعَالَى يَوْمُ النَّحْرِ ثُمَّ يَوْمُ الْقَرِّ ‏”‏ ‏‏ ‏.‏