Valmiki Ramayana Bala Kanda Sarga 23 Shloka 19

अर्घ्यम् respectable offerings, पाद्यम् water for washing feet, तथा and, आतिथ्यम् hospitality, कुशिकात्मजे to Visvamitra, निवेद्य having offered, पश्चात् thereafter, रामलक्ष्मणयो: for Rama and Lakshmana, अतिथिक्रियाम् acts of hospitality, अकुर्वन् performed.

After extending hospitality to the son of Kusika (Viswamitra) with respectful offerings, and water for washing feet they played the host to Rama and Lakshmana.