John Gill's  Exposition of the Bible 

2 Samuel 17:22

Then David arose, and all the people that were with him, and they passed over Jordan: by the morning light there lacked not one of them that was not gone over Jordan.

Then David arose, and all the people that were with him, and passed over Jordan,.... Taking the advice of Hushai:

by the morning light there lacked not one of them that was not gone over Jordan; they travelled all night, and before it was morning they had all passed the river in boats, or through the fords, and not one was lost in the passage, nor any deserted, see John 17:12; and now perhaps David penned the forty second and forty third psalms, Psalms 42:1.