Matthew Poole and continuators on Acts 20:36

36 ¶ And when he had thus spoken, he kneeled down, and prayed with them all.

A posture of great humility, becoming Prayer, and frequently used in such occasions, especially in a time of great trouble and distress; altho bodily exercise alone do not profit, 1 Tim. 4.8. yet we may, and must on occasion in Prayer bow the Knee, lift up the hand and eye▪ because it is a reasonable thing to give our bodies in his service, to God that made them. 2. By this we may shew that we are not ashamed to serve and own God before men. And 3. These outward signs do sometimes stir up our own and others devotion.

Marginal references: Chap. 21.5.