3 Fathers 3 Daily Prayers and No Siddur
Our Rabbis teach us that each of the forefathers (not four fathers) instituted one prayer:
Avraham, the morning prayer – Shacharis.
Yitzchak, the afternoon prayer – Minchah.
Yaakov, the evening prayer – Maariv.
Can you imagine how busy we would be if we had 10 forefathers?!