The Messenger of Allah ﷺ said: There are three (persons) whose actions are not recorded: a sleeper till he awakes, an idiot till he is restored to reason, and a boy till he reaches puberty. (Using translation from Abū Dāʾūd 4398)
أَنَّ رَسُولَ اللهِ ﷺ قَالَ رُفِعَ الْقَلَمُ عَنْ ثَلَاثَةٍ عَنِ النَّائِمِ حَتَّى يَسْتَيْقِظَ وَعَنِ الْمُبْتَلَى حَتَّى يَبْرَأَ وَعَنِ الصَّبِيِّ حَتَّى يَعْقِلَ