"A man may come and ask for something, and I refuse until you intercede, so that you will be rewarded." And the Messenger of Allah said: "Intercede and you will be rewarded." (Using translation from Nasāʾī 2557)
أَنَّ رَسُولَ اللهِ ﷺ قَالَ إِنَّ الرَّجُلَ لَيَسْأَلُنِي الشَّيْءَ فَأَمْنَعُهُ كَي تَشْفَعُوا فَتُؤْجَرُوا وَإِنَّ رَسُولَ اللهِ ﷺ قَالَ اشْفَعُوا تُؤْجَرُوا