Praying the Duha prayer is like charity given on behalf of your body

from the Prophet ﷺ that he said: "Each morning, charity is due upon every joint of one of you. Every glorification (saying ‘subḥān Allāh’) is charity, every praise (saying ‘al-ḥamdu lillāh’) is charity, every declaration of Allah’s oneness (saying ‘lā ilāha illā Allāh’) is charity, every magnification (saying ‘Allāhu akbar’) is charity; enjoining what is right is charity and forbidding what is wrong is charity. And two rak'ahs of prayer that one performs at the time of ḍuḥā (forenoon) suffice for all of that."

عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ: «يُصْبِحُ عَلَى كُلِّ سُلاَمَى مِنْ أَحَدِكُمْ صَدَقَةٌ، فَكُلُّ تَسْبِيحَةٍ صَدَقَةٌ، وَكُلُّ تَحْمِيدَةٍ صَدَقَةٌ، وَكُلُّ تَهْلِيلَةٍ صَدَقَةٌ، وَكُلُّ تَكْبِيرَةٍ صَدَقَةٌ، وَأَمْرٌ بِالْمَعْرُوفِ صَدَقَةٌ، وَنَهْىٌ عَنِ الْمُنْكَرِ صَدَقَةٌ، وَيُجْزِئُ مِنْ ذَلِكَ رَكْعَتَانِ يَرْكَعُهُمَا مِنَ الضُّحَى۔»

While we were present with Abu Dharr, he said: In the morning, alms are due for him, ever fast is alms, every pilgrimage is alms, every utterance of "Glory to be Allah" is alms, every utterance of "Allah is most great" is alms, every utterance of "Praise be to Allah" is alms. The Messenger of Allah ﷺ recounted all such good works. He then said: Two rak'ahs which one prays in the Duha serve instead of that.

يُصْبِحُ عَلَى كُلِّ سُلاَمَى مِنْ أَحَدِكُمْ فِي كُلِّ يَوْمٍ صَدَقَةٌ فَلَهُ بِكُلِّ صَلاَةٍ صَدَقَةٌ وَصِيَامٍ صَدَقَةٌ وَحَجٍّ صَدَقَةٌ وَتَسْبِيحٍ صَدَقَةٌ وَتَكْبِيرٍ صَدَقَةٌ وَتَحْمِيدٍ صَدَقَةٌ فَعَدَّ رَسُولُ اللَّهِ ﷺ مِنْ هَذِهِ الأَعْمَالِ الصَّالِحَةِ ثُمَّ قَالَ يُجْزِئُ أَحَدَكُمْ مِنْ ذَلِكَ رَكْعَتَا الضُّحَى

[Machine] The Messenger of Allah ﷺ said, "Every morning, charity is due on every joint of any one of you. Every utterance of praise is charity, every utterance of glorification is charity, every utterance of declaration of the greatness of Allah is charity, every utterance of praise of Allah is charity, commanding good is charity, and forbidding evil is charity. And there is a reward for prayer of two units (rak'at) that one performs during the forenoon (Duha) prayer."

قَالَ رَسُولُ اللهِ ﷺ يُصْبِحُ عَلَى كُلِّ سُلَامَى مِنْ أَحَدِكُمْ صَدَقَةٌ وَكُلُّ تَسْبِيحَةٍ صَدَقَةٌ وَتَهْلِيلَةٍ صَدَقَةٌ وَتَكْبِيرَةٍصَدَقَةٌ وَتَحْمِيدَةٍ صَدَقَةٌ وَأَمْرٌ بِالْمَعْرُوفِ صَدَقَةٌ وَنَهْيٌ عَنِ الْمُنْكَرِ صَدَقَةٌ وَيُجْزِئُ أَحَدَكُمْ مِنْ ذَلِكَ كُلِّهِ رَكْعَتَانِ يَرْكَعُهُمَا مِنَ الضُّحَى

"يُصْبحُ عَلَى كُلِّ سُلَامَى مِنْ أَحَدِكُمْ صَدَقَةٌ، فَكُلُّ تَسْبِيحَةٍ صَدَقَةٌ، وَكُلُّ تَحْمِيدَةٍ صَدَقَةٌ، وَكُلُّ تَهْلِيلَةٍ صَدَقَةٌ، وَكُلُّ تكْبِيرَةٍ صَدَقَةٌ، وَأَمْرٌ بِالْمَعْرُوفِ صَدَقَةٌ، وَنَهْىٌ عَنِ الْمُنْكَرِ صَدَقَةٌ، وَيُجْزِئُ مِنْ ذَلِكَ رَكْعَتَانِ يَرْكَعُهُمَا مِنَ الضُّحَى".