Hadith: They used to beat us over testimony and promises when we were still children

قال إبراهيم: "كانوا يَضْرِبُونَنا على الشَّهادة والعَهْد ونحن صِغار".
[صحيح] - [متفق عليه]

Ibrahīm said: ''They used to beat us over testimony and promises when we were still children.''
Sahih/Authentic. - [Al-Bukhari and Muslim]

Explanation

This report shows that some of the righteous predecessors would prevent their children from the habit of promising others to do things lest they fail to fulfill their promises and thus bear a sin for that. Likewise, they would prevent them from giving testimony lest it becomes a matter that they take lightly.