You broke in pieces the heads of Leviathan, You split open fountain and river, You dried up rivers of strength. Ps 74:14, 15.

'Drying up rivers of strength' stands for dispersing quite powerful falsities.

[2] In Zechariah,

I will gather them, for I will redeem them. I will bring them back from the land of Egypt, and gather them from Assyria. And I will bring them to the land of Gilead and Lebanon. He will go through the sea of distress; but he will strike the waves in the sea, and dry up all the depths of the River. And the pride of Asshur will be thrown down, and the rod of Egypt will depart. And I will render them strong in Jehovah. Zech 10:8-end.

This refers to those who in spiritual matters trust in themselves and their own wisdom, also to the dispersing of falsities through temptations. 'The land of Egypt' stands for factual knowledge; 'Assyria' stands for reasonings based on that knowledge; 'going through the sea of distress' stands for temptations; 'striking the waves in the sea, and drying up the depths of the River' stands for dispersing falsities from there; and 'the pride of Asshur will be thrown down, and the rod of Egypt will depart' stands for trusting no longer in their own wisdom but in wisdom received from the Lord, which is meant by 'I will render them strong in Jehovah'.

[3] Likewise in Isaiah,

He who says to Jerusalem, You will be dwelt in, and to the cities of Judah, You will be built, and I will raise up her waste places. He who says to the abyss, Be dry! and I will dry up your rivers. Isa 44:26, 27.

'Saying to the abyss, Be dry!' and 'drying up its rivers' stand for dispersing evils and falsities. But when 'waters' means truths, 'drying up' means a state that is truthless or devoid of truth, as in Isaiah,

I will pour out waters upon the thirsty land, and streams upon the dry. Isa 44:3.

'Waters' and 'streams' stand for truths, 'the dry land' for the place that is truthless.

[4] In Jeremiah,

O sword against the Chaldeans and against the inhabitants of Babel! O sword against its horses and against its chariots! A drought on its waters, in order that they may dry up! Jer 50:35, 37, 38.

'The Chaldeans' stands for those who render truths profane, and 'the inhabitants of Babel' for those who render forms of good profane, 1182, 1283, 1295, 1304, 1306-1308, 1321, 1322, 1326. 'Sword' stands for truth fighting against falsity, or for falsity fighting against truth, and from this for vastation, 2799, 4499, 6353, 7102; 'horses' stands for the power of understanding, 2761, 2762, 3217, 5321, 6125, 6534; 'chariots' stands for doctrinal teachings, 5321, 8146, 8148; and 'a drought on its waters, in order that they may dry up' stands for truths with no life at all in them owing to falsification.

But when the expressions 'dry' or 'drying up' are used in the Word in connection with other things, such as trees, plants, harvest, or bones, those things take on a contrary meaning. Also, in relation to the sea actual land is called the dry land; and in that case 'the dry land' has reference to good, and 'the sea' to truth.