CC Madhya 3.204

śacīra ānanda bāḍe dekhi’ putra-mukha
bhojana karāñā pūrṇa kaila nija-sukha
Word for word: 
śacīra — of Śacīmātā; ānanda bāḍe — pleasure increases; dekhi’ — seeing; putra-mukha — the face of her son; bhojana karāñā — feeding; pūrṇa — full; kaila — made; nija-sukha — her own happiness.
Translation: 
As mother Śacī constantly saw the face of her son and fed Him, her own happiness increased and was indeed complete.