“And We bestowed on him (Ibrahim) Ishaaq, and Ya’qub as an additional gift, and made them righteous. And We made them leaders to guide (the people) by Our command; and We inspired them to perform good deeds and observe their moral obligations and pay Zakaa; and they obeyed Us”. Suratul Ambiya, 21: 72, 73
Prophet Ishaaq (pbuh) was the younger son of Prophet Ibrahim (pbuh), by his wife Sarah. Prophet Ishaaq (pbuh) married his uncle’s daughter Rafqa, and they had twin sons, Isu and Prophet Ya’qub (pbuh).