What are the Sunnah occasions for saying "Lā ʾIlāha ʾIllā Allah"?

The word of monotheism, "La ilaha illa Allah" (There is no god but Allah), is the greatest word in existence, and it is the foundation of the religion and a pillar of faith. Its virtue has been mentioned in the hadith of the Messenger of Allah, peace and blessings be upon him: "The best of remembrance is 'La ilaha illa Allah'." It is recommended to frequently recite it at all times and in all places. It has also been encouraged in specific situations and times, including: after ablution, upon waking up at night, at the beginning of the day, after concluding prayers with the salutation, during distress and hardship, and on the Day of Arafah. Furthermore, it has been encouraged to recite it frequently to renew faith and before an obstacle comes between the servant and it.