This excerpt is taken from Sheikh Abu Hamza Abdul Khaliq Siddiqi's book Sahih Fazail-e-Amaal.
Allah Almighty says: ﴿إِنَّ الصَّفَا وَالْمَرْوَةَ مِن شَعَائِرِ اللَّهِ ۖ فَمَنْ حَجَّ الْبَيْتَ أَوِ اعْتَمَرَ فَلَا جُنَاحَ عَلَيْهِ أَن يَطَّوَّفَ بِهِمَا ۚ وَمَن تَطَوَّعَ خَيْرًا فَإِنَّ اللَّهَ شَاكِرٌ عَلِيمٌ﴾
"Indeed, Safa and Marwah are among the symbols of Allah. So whoever makes Hajj to the House or performs Umrah - there is no blame upon him for walking between them. And whoever volunteers good - then indeed, Allah is appreciative and Knowing."
Reference: (2-Al-Baqarah:158)
In this noble verse, Allah Almighty has mentioned Umrah along with Hajj. Umrah is shorter compared to Hajj; it consists of performing Tawaf of the House of Allah in the state of Ihram, then offering two Rak'ahs at Maqam Ibrahim, performing Sa'i between Safa and Marwah, and shaving or trimming the hair. These are the fundamental acts of Umrah. Other acts are additional under these.
Furthermore, in another place, it is stated:
﴿وَأَتِمُّوا الْحَجَّ وَالْعُمْرَةَ لِلَّهِ ۚ﴾
"And complete the Hajj and Umrah for Allah."
Reference: (2-Al-Baqarah:196)
عن ابن عباس رضي الله عنهما، أن النبى صلى الله عليه وسلم قال: فإن عمرة فى رمضان تقضي حجة أو حجة معي.
It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them) that the Prophet Muhammad (peace be upon him) said: "Performing Umrah in Ramadan is equivalent to Hajj, or (he said, the narrator is uncertain) equivalent to performing Hajj with me."
Reference: Sahih Bukhari, Book of Hunting Rewards, Chapter on Women's Hajj, No: 1863 - Sahih Muslim, Book of Hajj, Chapter on Umrah in Ramadan, No: 1256.
عن أبى هريرة رضي الله عنه أن رسول الله صلى الله عليه وسلم قال: العمرة إلى العمرة كفارة لما بينهما، والحج المبرور ليس له جزاء إلا الجنة
Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates that the Messenger of Allah (peace be upon him) said: "One Umrah to the next is an expiation for the sins committed in between, and the reward of an accepted Hajj is Paradise."
Reference: Sahih Bukhari, Book of Umrah, Chapter on the Obligation and Virtue of Umrah, No: 1773 - Sahih Muslim, Book of Hajj, Chapter on the Virtue of Hajj and Umrah, No: 1349.
