Valmiki Ramayana Ayodhya Kanda Sarga 73 Shloka 17

अथवा or, योगैः by employing the four expedients (conciliation, bribery, sowing dissenssions and punishment), बुद्धिबलेन वा or with the strength of intellect, मे to me, शक्तिः भवेत् I might get strength, अहम् I, पुत्रगर्धिनीम् covetous of son, त्वाम् you, सकामाम् having fulfilled your ambition, न करिष्यामि will not do.

If I gather the strength (to carry the burden) either by employing the four expedients (available to a king against an enemy) or by the power of intellect, I will not allow you, covetous of your son, to fulfil your ambition.