Albert Barnes Commentary Psalms 105:42

"For he remembered his holy word, [And] Abraham his servant." — Psalms 105:42 (ASV)

For he remembered ... - He was faithful to his promise made to Abraham, and did not forget his descendants in the hour of need. This is the statement made in (Psalms 105:8–9); and to illustrate and confirm the faithfulness of God, this reference is made to the history of the Hebrew people. See the notes at those verses.