Remember covenant acts from Abraham to exodus: Joseph and Israel enter Egypt

Famine is called, and Joseph is sent ahead through fetters

Moreover he called for a famine upon the land: he brake the whole staff of bread. He sent a man before them, even Joseph, who was sold for a servant: whose feet they hurt with fetters: he was laid in iron: until the time that his word came: the word of the LORD tried him. The king sent and loosed him; even the ruler of the people, and let him go free. He made him lord of his house, and ruler of all his substance: to bind his princes at his pleasure; and teach his senators wisdom.

The poem compresses Genesis: famine, sale, iron, testing word, then rule that teaches princes. Staff of bread broken is real hunger in the telling. The unit does not make every famine a called lesson, and it does not turn Joseph's fetters into a promise that every prisoner will be promoted.

Israel enters Egypt, grows strong, and hearts are turned to hate

Israel also came into Egypt; and Jacob sojourned in the land of Ham. He increased his people greatly; and made them stronger than their enemies. He turned their heart to hate his people, to deal subtilly with his servants.

Land of Ham is this psalm's name for Egypt, a poetic geography of the sojourn, not a racial map of later peoples. Increase and then hatred sit in one providence-telling. The line explains hostility inside the story of rescue. It must not be used to accuse Jewish people of causing hatred, or to treat any later community's success as a cue for persecution.