Know well that Messenger of Allah ﷺ combined 'Hajj and 'Umra, and nothing was revealed in the Book (to abrogate it), and the Messenger of Allah ﷺ too did not forbid us from (combining) them. And whatever a person said was out of his personal opinion. (Using translation from Muslim 1226f)
أَنَّ رَسُولَ اللهِ ﷺ قَدْ «جَمَعَ بَيْنَ حَجٍّ وَعُمْرَةٍ وَلَمْ يَنْزِلْ فِيهِمَا كِتَابٌ وَلَمْ يَنْهَ عَنْهُمَا النَّبِيُّ ﷺ» قَالَ فِيهِمَا رَجُلٌ بِرَأْيِهِ مَا شَاءَ