Genesis 18:12

“Therefore Sarah laughed within herself, etc.] Not for joy of a son, and as pleased with it, believing so it would be; but as disbelieving it, and perhaps deriding it, and confuting it with a laugh, which, though it did not appear in her countenance, was secretly in her heart: saying, not with her mouth, but in her mind, after I am waxed old, being almost ninety years of age, shall I have pleasure? in conception, or rather in having a son, and in suckling and nursing him, and bringing him up; for in bearing and bringing forth is sorrow: and my Lord being old also; which increased the difficulty and her unbelief: the Apostle Peter seems to have respect to this in (<600306>1 Peter 3:6).”

“Therefore Sarah laughed within herself--Long delay seems to have weakened faith. Sarah treated the announcement as incredible, and when taxed with the silent sneer, she added falsehood to distrust. It was an aggravated offense (Act 5:4), and nothing but grace saved her (Rom 9:18).”

“- The Visit of the Lord to Abraham 2. השׂתחיה vayı̂śtachû “bow,” or bend the body in token of respect to God or man. The attitude varies from a slight inclination of the body to entire prostration with the forehead touching the ground. 6. סאה se'ah a “seah,” about an English peck, the third part of an ephah. The ephah contained ten omers. The omer held about five pints. This chapter describes Abraham’s fellowship with God. On the gracious assurance of the Redeemer and Vindicator, “Fear not, I am thy shield and thy exceeding great reward,” he ceased to fear, and believed. On the solemn announcement of the Conqueror of evil and the Quickener of the dead, “I am God Almighty; walk before me…”