عَنْ أَنَسِ بْنِ مَالِكٍ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ: ((مَا مِنْ رَجُلٍ يُنْعِشُ لِسَانَهُ حَقًّا يُعْمَلُ بِهِ بَعْدِهِ إِلَّا أَجْرَى اللَّهُ عَلَيْهِ أَجْرَهُ إِلَى يَوْمِ الْقِيَامَةِ، ثُمَّ وَفَّاهُ اللَّهُ عَزَّ وَجَلَّ ثَوَابَهُ يَوْمَ الْقِيَامَةِ))
Narrated by Sayyiduna Anas bin Malik (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: Whoever uses his tongue for such a good deed that continues to be acted upon after him, Allah Almighty will continue to reward him until the Day of Resurrection, and on the Day of Resurrection, He will grant him the full reward.