John Chrysostom

Such, however, is not the nature of the righteous man. But what manner of man is he? Hear the same prophet, saying, "They that trust in the Lord are as Mount Zion." What means then, "As Mount Zion?" "He shall not be shaken," saith he, "for ever." For whatever engines thou bringest up, whatever darts thou hurlest, desiring to overturn a mountain, thou wilt never be able to prevail; for how canst thou? thou wilt break in pieces all thine engines, and exhaust thine own strength. Such also is the righteous man. …

Homilies Concerning The Statues 8:4 ↗

Athanasius of Alexandria

For to those who thus examine themselves and conform their hearts to the Lord, nothing adverse shall happen; for indeed, their hearts are strengthened by confidence in the Lord, as it is written, "They who trust in the Lord are as Mount Zion; he who dwells in Jerusalem shall not be moved forever." For if at any time, the crafty one shall be presumptuously bold against them, chiefly that he may break the rank of the saints and cause a division among brethren; even in this the Lord is with them, not only as an avenger on their behalf …

Letter 11.6 ↗

Augustine of Hippo

"They that put their trust in the Lord shall be even as the mount Sion: they shall not be removed for ever" [Psalm 125:1].

Exposition on Psalm 125 ↗