Translation:

29. But his wife came forward (laughing) aloud: she smote her forehead and said: "a barren old woman!"

Notes (Tafseer)

5009. Abraham's wife Sarah was old and barren. This news seemed to her too good to be true. She came forward, clamoured (xi. 71), struck her forehead with her hands, indicative of her amusement and incredulity as "a barren old woman": xi. 72.