Arcana Coelestia #8327
8327. 'On the mountain of Your inheritance' means the heaven where the good of charity resides. This is clear from the meaning of 'mountain of inheritance' as heaven. For 'mountain' means the good of love, 795, 796, 2722, 4210, 6435, and 'inheritance' means another's life, in this instance the Lord's; thus the life of goodness and truth which is derived from the Lord is meant, since those who possess this life are heirs of the kingdom and are called sons, 2658, 2851, 3672, 7212. Since these things are meant by 'the mountain of inheritance', heaven is also meant; for heaven is heaven by virtue of the good of love and it is the inheritance belonging to those who are the Lord's.
Arcana Coelestia #796
796. Because the Most Ancient Church conducted holy worship on mountains, the Ancient Churches therefore did so as well. Consequently with all the representative Churches of that time, and indeed with 'the nations' too, sacrifices were offered on mountains, and high places were built. This is clear from what is said about Abram in Genesis 12:8; 22:2; about the Jews before the Temple was built, in Deuteronomy 27:4-7; Joshua 8:30; 1 Samuel 9:12-14, 19; 10:5; 1 Kings 3:2-4; about the nations, in Deuteronomy 12:2; 2 Kings 17:9-11; about the Jews, who were idolaters, in Isaiah 57:7; 1 Kings 11:7; 14:23; 22:43; 2 Kings 12:3; 14:4; 15:3-4, 34-35; 16:4; 17:9-11; 21:3, 23:5, 8, 9, 13, 15.