The Messenger of Allah said: "Whoever provides the food for a fasting person to break his fast with, then for him is the same reward as his (the fasting person's), without anything being diminished from the reward of the fasting person." (Using translation from Tirmidhī 807)
أَنَّ رَسُولَ اللهِ ﷺ قَالَ «مَنْ فَطَّرَ صَائِمًا فَلَهُ مِثْلُ أَجْرُهُ إِنَّهُ لَا يَنْتَقِصُ مِنْ أَجْرِ الصَّائِمِ شَيْءٌ»