Valmiki Ramayana Kishkindha Kanda Sarga 62 Shloka 9
Original Shlokaतदन्नं मैथिलीप्राप्य विज्ञायेन्द्रादिदंत्विति। अग्रमुदृत्य रामाय भूतले निर्वपिष्यति।।4.62.9।।
1 source checked for this shloka
तदन्नं such food, मैथिली princess from Mithila, प्राप्य received, विज्ञाय having understood, अदिदंत्विति this is provided by, इन्द्रात् Indra, अग्रम् large portion, उदृत्य taken out, रामाय for Rama, भूतले on the earth, निर्वपिष्यति offers.
'Having understood that it has been provided by Indra, Sita will take out a large portion of it and pour it on the ground (as an offering to Rama) and say 'I offer it to Rama wherever he is on earth'.