The first narration was preferred by al-Muwaffaq, his nephew—the commentator on al-Muqniʿ—and al-Majd. (1)

This issue applies when a person has ample time: we instruct him first to cleanse himself after relieving himself, then to perform ablution, in accordance with the Prophet’s practice, peace and blessings be upon him. But if he forgets or is unaware, one cannot presume to invalidate his prayer or instruct him to repeat his ablution and prayer.