Hadith record

3. A number of our people have narrated from Sahl ibn Ziyad and Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad all from ibn Mahbub from ibn Ri’ab from Hamzah ibn Humran who has narrated the following: “I once asked abu ‘Abd Allah (a.s.), about the meaning of the words of Allah, most Majestic, most Glorious, ‘. . . speak of your Lord if you forget.’ He (the Imam) said, ‘It is in taking oath when you say, ‘By Allah, I will not do so and so and when you remember that you have forgotten to make an exception then say, ‘if Allah so wills.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.