Leviticus 19:14

Thou shalt not curse the deaf - Or speak evil of him, because he cannot hear, and so cannot vindicate his own character.

Nor put a stumbling - block before the blind - He who is capable of doing this, must have a heart cased with cruelty. The spirit and design of these precepts are, that no man shall in any case take advantage of the ignorance, simplicity, or inexperience of his neighbor, but in all things do to his neighbor as he would, on a change of circumstances, that his neighbor should do to him.

The meaning appears to be, "Thou shalt not utter curses to the deaf because he cannot hear thee, neither shalt thou put a stumbling-block in the way of the blind because he cannot see thee (compare Deuteronomy 27:18), but thou shalt remember that though the weak and poor cannot resist, nor the deaf hear, nor the blind see, God is strong, and sees and hears all that thou doest." Compare Job 29:15.

19:14 Before the blind - To make them fall. Under these two particulars are manifestly forbidden all injuries done to such as are unable to right or defend themselves; of whom God here takes the more care, because they are not able to secure themselves. Fear thy God - Who both can and will avenge them.