“And as soon as the lad was gone, David arose out of a place toward the south, and fell on his face to the ground, and bowed himself three times: and they kissed one another, and wept one with another, until David exceeded.”
King James Version (KJV)
Matthew Henry's Concise Commentary
20:35-42 The separation of two such faithful friends was grievous to both, but David's case was the more deplorable, for David was leaving all his comforts, even those of God's sanctuary. Christians need not sorrow, as men without hope; but being one with Christ, they are one with each other, and will meet in his presence ere long, to part no more; to meet where all tears shall be wiped from their eyes.
“What? know ye not that he which is joined to an harlot is one body? for two, saith he, shall be one flesh.”