It was narrated from Abu Al-Ja'd Ad-Damri-who was a Companion of the Prophet (ﷺ)- that the Prophet (ﷺ) said:
"Whoever missed three jumu'ahs out of negligence, Allah (SWT) will place a seal over his heart."
App reference: Book 14, Hadith 4
English reference: Vol. 2, Book 14, Hadith 1370
Arabic reference: Book 14, Hadith 1378