His hands are full/ he is very efficient (capable)

Figuratively: he is heavily involved in what is being done; he has done many things. Or: a capable doer.

("And this for Judah, and he said: Hear, O Lord, the voice of Judah, and bring him to his people; his hands are sufficient for him, and help from his adversaries shall be" - Deuteronomy 33:7 (Moses' blessing for the tribe of Judah), and likewise: "Old age on the day of judgment, and youth on the day of battle, like a man of war his hands are for him much" - the hymn recited in the Shacharit prayer of Shabbat and attributed to Rabbi Judah the Pious, or to his father, Rabbi Samuel)

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