Arcana Coelestia # 7797
7797. 'And Jehovah made Pharaoh's heart unyielding' means that they remained obstinate. This is clear from the meaning of 'making the heart unyielding' as remaining obstinate, dealt with in 7272, 7300, 7305. The fact that Jehovah does not make the heart unyielding or do anything bad, even though it is attributed to Him in the literal sense of the Word, see 7533, 7631, 7643.
Arcana Coelestia # 7201
7201. 'Therefore say to the children of Israel' means that the law of God will enable those who belong to the Lord's spiritual kingdom to discern. This is clear from the representation of Moses, the one who is told to 'say to the children of Israel', as the law of God, dealt with in 6723, 6752; from the meaning of 'saying' as discerning, dealt with in 1791, 1815, 1819, 1822, 1898, 1919, 2080, 2506, 2515, 2619, as enabling to discern, since the command 'say' has reference to the law of God; and from the representation of 'the children of Israel' as those who belong to the Lord's spiritual kingdom, dealt with in 6426, 6677.