Valmiki Ramayana Ayodhya Kanda Sarga 30 Shloka 36
Original Shlokaस्वर्गो धनं वा धान्यं वा विद्याः पुत्रास्सुखानि च। गुरुवृत्त्यनुरोधेन न किञ्चिदपि दुर्लभम्।।2.30.36।।
1 source checked for this shloka
गुरुवृत्त्यनुरोधेन fulfilling father's desire, स्वर्गः is heaven, धनं वा or wealth, धान्यं वा or foodgrains, विद्याः learning, पुत्राः sons, सुखानि च comforts, किञ्चिदपि anything, दुर्लभम् difficult to obtain, न not.
By fulfilling father's wish, nothing is difficult to achieve, whether it is heaven, or wealth, or foodgrains, or learning, or sons or other comforts.