Valmiki Ramayana Ayodhya Kanda Sarga 111 Shloka 15
Original Shlokaस तु राममवेक्षन्तं सुमन्त्रं पेक्ष्य दुर्मनाः। कुशोत्तरमुपस्थाप्य भूमावेवाऽस्तरत्स्वयम्।।2.111.15।।
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दुर्मनाः of troubled mind, स तु that Bharata, रामम् at Rama, अवेक्षन्तम् glancing at, सुमन्त्रम् Sumantra, प्रेक्ष्य seeing, स्वयमेव himself, कुशोत्तरम् of kusa grass, उपस्थाप्य having brought, भूमौ on the ground, आस्तरत् spread.
Bharata was mentally disturbed saw Sumantra waiting for Rama's order. Then he himself brought a heap of kusa grass and spread it on the ground.