Midrasch zu Mischlej 30:19

R. Jochanan, in the name of R. Simon b. Jochai, said: "What is the meaning of the passage (Pr. 30, 19) Do not calumniate a servant unto his master, lest he curse thee, and incur guilt. And [immediately after] is written, There is a generation that curseth its father, and does not bless its mother. Is it because it curseth its father and does not bless its mother that you must not calumniate? We must therefore explain it as follows: Even in a generation that curseth its father and does not bless its mother, a man should not calumniate a servant unto his master. Whence do we learn this? From Hosea.

The ministering angels were going to and fro and walking before him like friends who guard the wedding canopies, as it is said, "For he shall give his angels charge over thee, to keep thee in all thy ways" (Ps. 91:11). (The word) "way" here means only the way of bridegrooms. The Holy One, blessed be He, was like a precentor. What is the custom observed by the precentor? He stands and blesses the bride in the midst of her wedding chamber. Likewise the Holy One, blessed be He, stood and blessed Adam and his help-mate, as it is said, "And God blessed them" (Gen. 1:28).