1 Samuel 2:3 (BSB)

Do not boast so proudly, or let arrogance come from your mouth, for the LORD is a God who knows, and by Him actions are weighed.

From 1 Samuel 2. Also in the ESV.

Commentary on 1 Samuel 2:3

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on 1 Samuel 2:1-10: We have here Hannah's thanksgiving, dictated, not only by the spirit of prayer, but by the spirit of prophecy. Her petition for the mercy she desired we had before (Sa1 1:11), and here we have her return of praise; in both out of the abundance of a heart deeply affected (in the former with her own wants, and in the latter with God's goodness) her mouth spoke.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on 1 Samuel 2:3: Talk no more so exceeding proudly,.... At such an high rate, in such an overbearing manner, as if above everyone; this may have respect to Peninnah, and all that joined with her to provoke Hannah to anger, and make her fret, insulting and triumphing over her, because she had not children, as they had; but now their mouths would be stopped, and their talk over...
• Geneva Bible Notes (Reformed), Geneva Bible Study Notes on 1 Samuel 2:3: Talk no more so exceeding proudly; let [not] arrogancy come out of your mouth: for the LORD [is] a God of knowledge, and by him actions are weighed. (d) In that you condemn my barrenness, you show your pride against God.
• Adam Clarke (Methodist), Clarke's Commentary on the Bible on 1 Samuel 2:3: A God of knowledge - He is the most wise, teaching all good, and knowing all things. Actions are weighed - נתכנו nithkenu, they are directed; it is by his counsel alone that we can successfully begin, continue, or end, any work.