Webster's Revised Unabridged Dictionary · 1913

His

His (hiz) , pronoun

[Anglo-Saxon his of him, his, gen. masc. & neut. of , neut. hit. See He.]

1.
Belonging or pertaining to him; -- used as a pronominal adjective or adjective pronoun; as, tell John his papers are ready; formerly used also for its, but this use is now obsolete.
No comfortable star did lend his light. — Shakespeare
Who can impress the forest, bid the tree Unfix his earth-bound root? — Shakespeare

Also formerly used in connection with a noun simply as a sign of the possessive. “The king his son.” Shak. “By young Telemachus his blooming years.” Pope. This his is probably a corruption of the old possessive ending -is or -es, which, being written as a separate word, was at length confounded with the pronoun his.

2.
The possessive of he; as, the book is his.
The sea is his, and he made it. — Bible (KJV) - Psalm xcv. 5