Sunan an-Nasa'i #3140

الْعُمْرَةُ إِلَى الْعُمْرَةِ كَفَّارَةٌ لِمَا بَيْنَهُمَا وَالْحَجُّ الْمَبْرُورُ لَيْسَ لَهُ جَزَاءٌ إِلاَّ الْجَنَّةُ

The Messenger of Allah (ﷺ) said: 'An Umrah to the next Umrah is an expiation for what is between them, and an accepted Hajj has no reward other than Paradise.'