וַיַּגִּ֨דוּ ל֜וֹ לֵאמֹ֗ר ע֚וֹד יוֹסֵ֣ף חַ֔י וְכִֽי־ה֥וּא מֹשֵׁ֖ל בְּכָל־אֶ֣רֶץ מִצְרָ֑יִם וַיָּ֣פָג לִבּ֔וֹ כִּ֥י לֹא־הֶאֱמִ֖ין לָהֶֽם׃
And they told him, saying: ‘Joseph is yet alive, and he is ruler over all the land of Egypt.’ And his heart fainted, for he believed them not.
Read halakhic rulings (Jewish law) on Genesis 45:26: and classical halakhic sources.