And if the house be worthy, let your peace come upon it: but if it be not worthy, let your peace return to you.
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George Leo Haydock
And if that house i.e. if it be worthy to receive your peace. In St. Luke (Chap. x, ver. 6) it is written, And if the son of peace be there: that is, a lover of peace, or one worthy of peace and prosperity. Thus a son of death means one deserving of death. (Menochius)
Your peace shall come upon it. If men will not hearken to your instructions, you have this comfort and peace of mind, that you have discharged your duty. (Witham)