Valmiki Ramayana Yuddha Kanda Sarga 48 Shloka 36
Original Shlokaततस्त्रिजटयासार्थंपुष्पकादवरुह्यसा । अशोकवनिकामेवराक्षसीभिःप्रवेशिता ।।6.48.36।।
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ततः thereafter, सा she, त्रिजटयासार्थम् along with Trijata, पुष्पकात् in Pushpaka, अनरुह्य making to get down, राक्षसीभिः rakshasi also, अशोकवनिकामेव to Ashoka grove, प्रवेशिता entered.
Thereafter Sita along with Trijata went to Pushpaka. Making Sita to get down, rakshasi also entered Ashoka grove.