Valmiki Ramayana Bala Kanda Sarga 16 Shloka 20
Original Shlokaभार्याणामनुरूपाणामश्नीतेति प्रयच्छ वै। तासु त्वं प्राप्स्यसे पुत्रान्यदर्थं यजसे नृप।।1.16.20।।
1 source checked for this shloka
नृप O King, अश्नीत इति "consume it", अनुरूपाणाम् worthy, भार्याणाम् consorts, प्रयच्छ वै give it to them, यदर्थम् for whose sake, यजसे you are performing this sacrifice, पुत्रान् such sons, तासु inthem, त्वम् you, प्राप्स्यसे will obtain.
O King you are performing this sacrifice for the sake of sons. Give this to your worthy consorts to consume it. They will bear you sons".