Valmiki Ramayana Bala Kanda Sarga 1 Shloka 66

तथा then, पुनश्च again, प्रत्ययम् confidence, जनयन् creating, एकेन with one, महेषुणा mighty shaft, सप्त सालान् seven palmyra trees, गिरिम् a mountain, रसातलं चैव Rasatala (one of the seven lower worlds under the earth), बिभेद penetrated.

Again inorder to create confidence (in Sugriva), he released a single mighty shaft which penetrated seven palmyra trees, a mountain and the Rasatala.