Valmiki Ramayana Ayodhya Kanda Sarga 39 Shloka 36

सः he, अभिनीतार्थम् with highly polished meaning, एतावत् up to this extent, वचः words, उक्त्वा having spoken, आवेक्ष्य after looking at them, त्रयः three, त्रयश्शतशतार्धा: three hundred and fifty, मातरः च mothers, ददर्श he saw.

Speaking thus to his mother with highly polished words, he then turned his gaze at his other three hundred and fifty mothers.