Verse 18

अथवा निग्रहं प्राप्तं करोम्येतेन वै विना ।वर्तते न प्रजैवेयं विना वारि सरिद्यथा

In plain words

Or rather, I carry out the restraint that is due; without it, these subjects cannot endure -- as a river cannot be, without water.