Valmiki Ramayana Yuddha Kanda Sarga 48 Shloka 33
Original Shlokaत्यजशोकंचमोहंचदुःखंचजनकात्मजे । रामलक्ष्मणयोरर्थेनाद्यशक्यमजीवितुम् ।।6.48.33।।
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जनकात्मजे Janaki, रामलक्ष्मणयोः Rama and Lakshmana अर्थे both, शोकम् sorrow, दुःखंच and grief, मोहंच and delusion, त्यज giving up, अद्य get up, अजीवितुम् are alive, नशक्यम् not possible.
"O Janaka's daughter! You give up grief and delusion about Rama and Lakshmana. They are alive, no doubt."