וַחֲמֹרִ֕ים שְׁלֹשִׁ֥ים אֶ֖לֶף וַחֲמֵ֣שׁ מֵא֑וֹת וּמִכְסָ֥ם לַֽיהוָ֖ה אֶחָ֥ד וְשִׁשִּֽׁים׃
And the asses were thirty thousand and five hundred, of which the LORD’S tribute was threescore and one.
Read kabbalistic (mystical) interpretation of Numbers 31:39: and classical mystical sources.