Meditate bhikkhu! Don’t be heedless!
Don’t let pleasures whirl the mind!
Heedless, do not gulp a glob of iron!
Bewail not when burning, ‘This is dukkha’!
Explanation: O monk, meditate and do not be indolent. Do not allow your mind to loiter among sensual pleasures. If you allow it, it will be like having iron balls forced down your throat in hell. You will bewail your fate crying, “This is suffering,” Do not allow it to happen. Source: Buddhanet