the Messenger of Allah (ﷺ) said: "Whoever takes an oath, and swears, saying: 'By Al-Lat and Al-Uzza,' let him say:'La ilaha illallah.' "
Sunan Ibn Majah Book 11, Hadith 7
← Previous Hadith the Messenger of Allah (ﷺ) said: 'Do not take oaths by idols nor by your forefathers. "

Sunan Ibn Majah Book 11, Hadith 6 Next Hadith → "I took an oath by Lat and 'Uzza. The Messenger of Allah (ﷺ) said : 'Say: "La ilaha illallah wahdahu la sharika lahu" (None has the right to be worshipped but Allah alone, with no partner or associate)," then spit toward your left three times, and seek refuge with Allah, and do not do that again."'

Sunan Ibn Majah Book 11, Hadith 8