Kneeling is the usual position for prayer, along with bowing the head. Is this the “Bible-approved” position? Yes and no. Some people did pray while kneeling. But some people prayed while standing (Jer. 18:20); sitting (2 Sam. 7:18); even lying face down (Matt. 26:39).
Some people prayed with hands lifted up, which is now becoming common again (1 Kings 8:22; 1 Tim. 2:8). People prayed silently (1 Sam. 1:13) and out loud (Ezek. 11:13). They prayed alone (Matt. 6:6) and in groups (Acts 4:31).
They prayed in an open field (Gen. 24:11–12); in the temple (2 Kings 19:14); at a riverside (Acts 16:13); on a seashore (Acts 21:5); in bed (Ps. 63:6); and on a battlefield (1 Sam. 7:5).
Only one verse in the Bible hints that people bowed their heads while they prayed: King Hezekiah and his officials “bowed their heads and worshiped” (2 Chron. 29:30).
Even in this verse, we aren’t sure that bowing the head was actually connected with praying.
What about closing the eyes while praying? The Bible never mentions it. It doesn’t mention placing the hands together, either.