Hadithcore
Mishkat al-Masabih, 4523

He reported God’s messenger as saying:

“Do not afflict your children by squeezing for a swelling in the uvula, but apply costus.” (Bukhari and Muslim .)

وَعَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لَا تُعَذِّبُوا صِبْيَانَكُمْ بِالْغَمْزِ مِنَ الْعُذْرَةِ عَلَيْكُمْ بِالْقُسْطِ»

References1 variant
In-Book Reference
Book 23, Hadith 10