Valmiki Ramayana Sundara Kanda Sarga 13 Shloka 39
Original Shlokaमय्यगच्छति चेहस्थे धर्मात्मानौ महारथौ।।5.13.39।। आशया तौ धरिष्येते वानराश्च मनस्विनः।
1 source checked for this shloka
मयि when I, अगच्छति not go, इहस्थे stay here, धर्मात्मानौ righteous selves, महारथौ great warriors, तौ both, आशया with hope, धरिष्येते both will survive, मनस्विनः highsouled, वानराश्च vanaras also.
Both the highsouled warrior princes treading a righteous path as well as the vanaras will survive with a hope of my return if I stay back.