Thou camest but yesterday - Meaning, “You are not a native Israelite, but only a sojourner for a few years; therefore, there is no reason fo…

Then said the king to Ittai the Gittite, Wherefore goest thou also with us? return to thy place, and abide with the king: for thou art a strang…

Whereas you came [but] yesterday
From Gath, or from an expedition he and his men had been on:

David determined to leave Jerusalem. He took this resolve as a penitent submitting to the rod. Before unrighteous Absalom, he could justify himself…