The Joseph-Jacob reunion

Joseph ordered his chariot and went to Goshen to meet his father Israel; he presented himself to him and, embracing him around the neck, he wept on his neck a good while.

ויבך על צואריו עוד AND WEPT ON HIS NECK A GOOD WHILE — The phrase ויבך עוד signifies weeping copiously. ... Here, he wept greatly and continuously — more than is usual. Jacob, however, did not fall upon Joseph’s neck nor did he kiss him. Our Rabbis say: the reason was that he was reciting the Shema.

AND HE APPEARED BEFORE HIM. ... it is not respectful for Joseph to fall upon his father’s neck. He should rather bow before him or kiss his hands, as it is written, And Joseph brought them out from between his knees, and he fell down on his face. ...

Therefore Scripture mentioned that when he appeared before his father, who stared at him and finally recognized him, his father fell on his neck and cried again over him, even as he had continually cried over him to this day when he had not seen him after his disappearance, and then Jacob said, Now let me die, since I have seen thy face. It is a known matter as to whose tears are more constant: that of an old father who finds his son alive after having despaired of him and having mourned for him, or that of a grown-up son who reigns.