The Prophet ﷺ said: If anyone sits in his place of prayer when he finishes the dawn prayer till he prays the two rak'ahs of the forenoon, saying nothing but what is good, his sins will be forgiven even if they are more than the foam of the sea.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ مَنْ قَعَدَ فِي مُصَلاَّهُ حِينَ يَنْصَرِفُ مِنْ صَلاَةِ الصُّبْحِ حَتَّى يُسَبِّحَ رَكْعَتَىِ الضُّحَى لاَ يَقُولُ إِلاَّ خَيْرًا غُفِرَ لَهُ خَطَايَاهُ وَإِنْ كَانَتْ أَكْثَرَ مِنْ زَبَدِ الْبَحْرِ  

The Prophet ﷺ said: If anyone sits in his place of prayer when he finishes the dawn prayer till he prays the two rak'ahs of the forenoon, saying nothing but what is good, his sins will be forgiven even if they are more than the foam of the sea. (Using translation from Abū Dāʾūd 1287)   

عَنْ رَسُولِ اللهِ ﷺ أَنَّهُ قَالَ مَنْ قَعَدَ فِي مُصَلَّاهُ حِينَ يُصَلِّي الصُّبْحَ حَتَّى يُسَبِّحَ الضُّحَى لَا يَقُولُ إِلَّا خَيْرًا غُفِرَتْ لَهُ خَطَايَاهُ وَإِنْ كَانَتْ أَكْثَرَ مِنْ زَبَدِ الْبَحْرِ  

[Machine] On the authority of the Prophet, ﷺ , he said, "Whoever sits in his place of prayer from the dawn prayer until he prays the forenoon prayer, he will only say what is good. His sins will be forgiven, even if they are more than the foam of the sea." And the wording belongs to the Hadith of Rishdeen.  

عَنِ النَّبِيِّ ﷺ قَالَ «مَنْ قَعَدَ فِي مُصَلَّاهُ حِينَ يُصَلِّي الْغَدَاةَ حَتَّى يُصَلِّيَ الضُّحَى لَا يَقُولُ إِلَّا خَيْرًا غُفِرَتْ لَهُ خَطَايَاهُ وَإِنْ كَانَتْ أَكْثَرَ مِنْ زَبَدِ الْبَحْرِ» وَاللَّفْظُ لِحَدِيثِ رِشْدِينَ  

"مَنْ قعَدَ فِي مُصَلاه حَتَّى يَنْصَرَفَ مِنَ صَلاة الصُّبْحِ حَتَّى يُسبِّحَ رَكعَتَى الضُّحَى لا يَقُولُ إِلا خَيرًا غُفِرَ لَهُ خَطَايَاهُ وَإِنْ كَانَتْ أَكْثَرَ مِنْ زَبَد البَحْر".