Valmiki Ramayana Yuddha Kanda Sarga 81 Shloka 28

प्लवङ्गम monkey, स्त्रियः woman, न हन्तव्याःइति not to be killed, यत् by that, यत् who ever, अमित्राणाम् enemy, पीडाकरम् causes trouble, स्यात् to be done, तत् that, कर्तव्यमेव that action alone

"O Hanuman! You said women should not be killed. But whoever causes trouble to the enemy, action should be taken, said Indrajith."