181 And the Lord appeared to him by the oaks of Mamre, as he sat at the door of his tent in the heat of the day. 2 He lifted up his eyes and looked, and behold, three men stood in front of him. When he saw them, he ran from the tent door to meet them, and bowed himself to the earth, 3 and said, "My lord, if I have found favor in your sight, do not pass by your servant. 4 Let a little water be brought, and wash your feet, and rest yourselves under the tree, 5 while I fetch a morsel of bread, that you may refresh yourselves, and after that you may pass on--since you have come to your servant." So they said, "Do as you have said." 6 And Abraham hastened into the tent to Sarah, and said, "Make ready quickly three measures of fine meal, knead it, and make cakes." 7 And Abraham ran to the herd, and took a calf, tender and good, and gave it to the servant, who hastened to prepare it. 8 Then he took curds, and milk, and the calf which he had prepared, and set it before them; and he stood by them under the tree while they ate.
9 They said to him, "Where is Sarah your wife?" And he said, "She is in the tent." 10 The Lord said, "I will surely return to you in the spring, and Sarah your wife shall have a son." And Sarah was listening at the tent door behind him. 11 Now Abraham and Sarah were old, advanced in age; it had ceased to be with Sarah after the manner of women. 12 So Sarah laughed to herself, saying, "After I have grown old, and my husband is old, shall I have pleasure?" 13 The Lord said to Abraham, "Why did Sarah laugh, and say, 'Shall I indeed bear a child, now that I am old?' 14 Is anything too hard for the Lord? At the appointed time I will return to you, in the spring, and Sarah shall have a son." 15 But Sarah denied, saying, "I did not laugh"; for she was afraid. He said, "No, but you did laugh."
Matthew Henry's Commentary on Genesis 18:1-15
Commentary on Genesis 18:1-8
(Read Genesis 18:1-8)
Abraham was waiting to entertain any weary traveller, for inns were not to be met with as among us. While Abraham was thus sitting, he saw three men coming. These were three heavenly beings in human bodies. Some think they were all created angels; others, that one of them was the Son of God, the Angel of the covenant. Washing the feet is customary in those hot climates, where only sandals are worn. We should not be forgetful to entertain strangers, for thereby some have entertained angels unawares, Revelation 3:20.
Commentary on Genesis 18:9-15
(Read Genesis 18:9-15)
Where is Sarah thy wife? was asked. Note the answer, In the tent. Just at hand, in her proper place, occupied in her household concerns. There is nothing got by gadding. Those are most likely to receive comfort from God and his promises, who are in their proper place, and in the way of their duty, 17; but He who searches the heart, saw that the one sprung from unbelief, and the other from faith. She denied that she had laughed. One sin commonly brings in another, and it is not likely we shall strictly keep to truth, when we question the Divine truth. But whom the Lord loves he will rebuke, convict, silence, and bring to repentance, and if they sin before him.