ENOfficial
Umm Salama said she heard God's messenger say, “If anyone puts on the ihram for a hajja or an ‘umra from the Aqsa mosque to the sacred mosque, his former and latter sins will be forgiven him," or, “he will be guaranteed paradise." Abu Dawud and Ibn Majah transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَنْ أُمِّ سَلَمَةَ قَالَتْ: سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُولُ: " مَنْ أَهَلَّ بِحَجَّةٍ أَوْ عُمْرَةٍ مِنَ الْمَسْجِدِ الْأَقْصَى إِلَى الْمَسْجِدِ الْحَرَامِ غُفِرَ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ وَمَا تَأَخَّرَ أَوْ وَجَبَتْ لَهُ الْجَنَّةُ. رَوَاهُ أَبُو دَاوُدَ وَابْنُ مَاجَهْ
sunnah.com