John Gill Commentary Genesis 43:30

"And Joseph made haste; for his heart yearned over his brother: and he sought where to weep; and he entered into his chamber, and wept there." — Genesis 43:30 (ASV)

And Joseph made haste To get out of the room where he was with his brethren as fast as he could: for his bowels yearned upon his brother; his passions grew strong, his affections were raised, his heart was full of tenderness, and there was such a flow of love and joy at the sight of his brother, and the little conversation he had with him, that he was ready to burst out, and must have discovered himself if he had not immediately turned and got out of the room.

and he sought [where] to weep; a proper place to vent his passion in tears of joy, and relieve himself

and he entered into [his] chamber, and wept there; where he could be the most retired, and not likely to be overheard.