Imām Bukhārī narrates: Hasan ibn Sabbāh narrated to us, he heard from Rawh, he said: Sa'īd narrated to us, from Qatādah, from Anas ibn Mālik, may Allāh be pleased with him:

that the Prophet ﷺ and Zaid ibn Thābit, may Allāh be pleased with him, had suhūr. When the two of them finished suhūr, the Prophet ﷺ stood up for the prayer and prayed. Rawh said: I asked Anas: How much time was there between their having suhūr and praying? He said: As much time as it takes for a person to recite fifty verses.