3 verses have
strength
in Edition Clear Qur'an by Talal Itani / Hud (Hud)

11:52“O my people, ask forgiveness from your Lord, and repent to Him. He will release the sky pouring down upon you, and will add strength to your strength. And do not turn away and be wicked.”

11:80He said, “If only I had the strength to stop you, or could rely on some strong support.”

11:120Everything We narrate to you of the history of the messengers is to strengthen your heart therewith. The truth has come to you in this, and a lesson, and a reminder for the believers.