"Intercede and your intercession may be accepted, and Allah, the Mighty and Sublime, decrees on the lips of His Prophet whatsoever He will." (Using translation from Nasāʾī 2556)  

عَنِ النَّبِيِّ ﷺ قَالَ «اشْفَعُوا تُشَفَّعُوا وَيَقْضِي اللهُ عَلَى لِسَانِ نَبِيِّهِ مَا شَاءَ»  

"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