Sunan Ibn Majah, Hadith 1009 ⓘ
It was narrated that Anas bin Malik told that ‘Umar said: “I said: ‘O Messenger of Allah, why do you not take the Maqam of Ibrahim as a place of prayer?’ Then the following was revealed: ‘And take you (people) the Maqam of Ibrahim as a place of prayer.’” [2:125]
حَدَّثَنَا مُحَمَّدُ بْنُ الصَّبَّاحِ، حَدَّثَنَا هُشَيْمٌ، عَنْ حُمَيْدٍ الطَّوِيلِ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ قَالَ عُمَرُ قُلْتُ يَا رَسُولَ اللَّهِ لَوِ اتَّخَذْتَ مِنْ مَقَامِ إِبْرَاهِيمَ مُصَلًّى فَنَزَلَتْ {وَاتَّخِذُوا مِنْ مَقَامِ إِبْرَاهِيمَ مُصَلًّى} .
also referenced under: Book 5, Hadith 1062 (In-Book) & Volume 2, Book 5, Hadith 1009 (DarusSalam)