Those “400 years ” of affliction evidently began in 1913 B.C.E. when Ishmael mocked Isaac at the time of his being weaned, and they ended when the Israelites made their exodus out of Egypt in 1513 B.C.E.
वे 400 साल ईसा पूर्व 1913 में शुरू हुए जब इश्‍माएल, इसहाक के साथ बुरा व्यवहार करने लगा ।