5בְּנִשּׂוּאִין כֵּיצַד. אָסוּר לִשָּׂא אִשָּׁה כָּל שְׁלֹשִׁים יוֹם. וּמֻתָּר לְאָרְשָׂהּ אֲפִלּוּ בְּיוֹם הַמִּיתָה. וּמִי שֶׁמֵּתָה אִשְׁתּוֹ אִם כְּבָר קִיֵּם מִצְוַת פְּרִיָּה וּרְבִיָּה וְיֵשׁ לוֹ מִי שֶׁיְּשַׁמְּשֶׁנּוּ וְאֵין לוֹ בָּנִים קְטַנִּים הֲרֵי זֶה אָסוּר לִשָּׂא אִשָּׁה אַחֶרֶת עַד שֶׁיַּעַבְרוּ עָלָיו שְׁלֹשָׁה רְגָלִים. אֲבָל מִי שֶׁלֹּא קִיֵּם מִצְוַת פְּרִיָּה וּרְבִיָּה אוֹ שֶׁקִּיֵּם וְיֵשׁ לוֹ בָּנִים קְטַנִּים אוֹ שֶׁאֵין לוֹ מִי שֶׁיְּשַׁמְּשֶׁנּוּ הֲרֵי זֶה מֻתָּר לְאָרְשָׂהּ וְלִכְנֹס מִיָּד. וְאָסוּר לוֹ לָבוֹא עָלֶיהָ עַד שְׁלֹשִׁים יוֹם. וְכֵן הָאִשָּׁה שֶׁהָיְתָה אֲבֵלָה לֹא תִּבָּעֵל עַד שְׁלֹשִׁים יוֹם:
What does the prohibition against marriage involve? It is forbidden to marry a woman throughout these 30 days. It is, however, permitted to consecrate her even on the day of the death of one's relative. When a man's wife dies, if he already fulfilled the mitzvah of procreation, and he has someone to attend to him and he does not have young children, he may not remarry until three festivals pass. If, however, a person has not fulfilled the mitzvah of procreation, or fulfilled the mitzvah and has young children, or does not have someone to attend to him, he is permitted to consecrate and marry immediately. It is, however, forbidden for him to enter into relations with his wife until 30 days have passed. Similarly, a woman who was in mourning should not enter into relations until 30 days have passed.