Valmiki Ramayana Kishkindha Kanda Sarga 14 Shloka 13

ते to you, प्रत्यक्षम् in your presence, मया by me, बाणेन by an arrow, सप्त seven, सालाः sala trees, दारिताः are torn, ततः then, अद्य now, मया by me, वालिनम् Vali, बलेन by strength, निहतम् killed, वेहि you may know.

'You have seen how I have pierced through seven sala trees with a single arrow. You will know how with the same strength I will kill Vali.'