Musannaf Ibn Abi Shaybah 4737 — Lightening the prayer: those who used

Mus'ab bin Sa'd said: When my father prayed in the mosque, he kept the bowing and prostration short and prayed lightly, and when he prayed at home, he lengthened the prayer and the bowing and prostration. I asked him about this, and he said: "We are imams who are followed."