From Sahih Muslim (Hadith 2611):
This hadith has been narrated by Ja'far with the same chain of transmitters and he added:It was said to him (to the Holy Prophet): There are people to whom fasting has become unbearable and they are waiting how you do. He (the Holy Prophet) then called for a cup of water when it was afternoon. The rest of the hadith is the same
Reference: Muslim 2611