رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 1278
The Book of Hajj
The Obligation of Hajj (Pilgrimage) and its Excellence
وَعَنِ ابْنِ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُمَا، أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: عُمْرَةٌ فِي رَمَضَانَ تَعْدِلُ عمرة أو حجة معي . ((مُتَّفَقٌ عَلَيْهِ))
Ibn 'Abbas (May Allah be pleased with them) reported: The Prophet (ﷺ) said, "(The performance of) 'Umrah during Ramadan is equal to Hajj (pilgrimage)." Or said, "Equal to the performance of Hajj with me." [Al-Bukhari and Muslim].
Riyad as-Salihin, 1278