Ezekiel 3:26-27

3:26 I will make your tongue stick to the roof of your mouth so that you will be silent and unable to reprove them, for they are a rebellious house. 3:27 But when I speak with you, I will loosen your tongue and you must say to them, ‘This is what the sovereign Lord says.’ Those who listen will listen, but the indifferent will refuse, for they are a rebellious house.

Ezekiel 29:21

29:21 On that day I will make Israel powerful, and I will give you the right to be heard among them. Then they will know that I am the Lord.”

Ezekiel 33:22

33:22 Now the hand of the Lord had been on me the evening before the refugee reached me, but the Lord opened my mouth by the time the refugee arrived in the morning; he opened my mouth and I was no longer unable to speak.

Exodus 6:11-12

6:11 “Go, tell Pharaoh king of Egypt that he must release the Israelites from his land.” 6:12 But Moses replied to the Lord, “If the Israelites did not listen to me, then how will Pharaoh listen to me, since I speak with difficulty?”

Psalms 51:15

51:15 O Lord, give me the words!

Then my mouth will praise you.

Luke 21:15

21:15 For I will give you the words along with the wisdom that none of your adversaries will be able to withstand or contradict.

Ephesians 6:19

6:19 Pray for me also, that I may be given the message when I begin to speak – that I may confidently make known the mystery of the gospel,