in his lying down and rising up
At all times, during every action that a person performs, from lying down in the evening to rising up in the morning.
("And you shall teach them diligently to your children, and you shall speak of them when you sit in your house, and when you walk by the way, and when you lie down, and when you rise up" - Deuteronomy 6:7)
Translation
Expression (Hebrew)
בְּשָׁכְבוֹ וּבְקוּמוֹ
Definition (Hebrew)
בְּשָׁכְבוֹ לִישֹׁן וּמִיָּד כְּשֶׁמַּשְׁכִּים בַּבֹּקֶר. בְּהַשְׁאָלָה: בְּכָל עֵת.
("וְשִׁנַּנְתָּם לְבָנֶיךָ וְדִבַּרְתָּ בָּם בְּשִׁבְתְּךָ בְּבֵיתֶךָ וּבְלֶכְתְּךָ בַדֶּרֶךְ וּבְשָׁכְבְּךָ וּבְקוּמֶךָ"- דְּבָרִים ו ז)