The Amidah, whose name means 'standing,' and which is also called Shemoneh Esreh, the eighteen, after the traditional count of its blessings on weekdays, though the number has varied historically and a nineteenth was added in the rabbinic period, opens with a blessing invoking God specifically as the God of Abraham, Isaac and Jacob, establishing covenantal memory as the frame for everything that follows rather than beginning with either praise in the abstract or immediate petition. Its formal title, Avot, fathers, reflects this focus, and rabbinic sources treat this opening blessing as so structurally essential that later legal discussion addresses in detail what a worshipper must do if interrupted or uncertain partway through it, given its foundational place at the head of the entire prayer.
The Amidah as a whole is recited silently while standing, facing Jerusalem where possible, before being repeated aloud by the prayer leader in congregational settings, a repetition, called the chazarat hashatz, that exists specifically to allow those unable to read the full text themselves to fulfill the obligation by listening and responding 'amen.' This opening blessing's reference to the patriarchs by name, rather than to God in more general terms, ties Jewish daily prayer explicitly to a specific ancestral lineage and covenant rather than presenting the prayer as addressed to a deity known apart from that particular history.