1 Corinthians 9:9

9:9 For it is written in the law of Moses, “Do not muzzle an ox while it is treading out the grain.” ¹  God is not concerned here about oxen, is he?

1 Corinthians 14:21

14:21 It is written in the law: “By people with strange tongues and by the lips of strangers I will speak to this people, yet not even in this way will they listen to me,” ²  says the Lord.

[9:9]  ¹ sn A quotation from Deut 25:4.

[14:21]  ² sn A quotation from Isa 28:11-12.