Albert Barnes Commentary Job 29:13

"The blessing of him that was ready to perish came upon me; And I caused the widow`s heart to sing for joy." — Job 29:13 (ASV)

The blessing of him that was ready to perish ... - Of the man who was falsely accused, and who was in danger of being condemned, or of him who was exposed to death by poverty and want.

And I caused the widow’s heart to sing for joy - By becoming her patron and friend; by vindicating her cause and saving her from the oppressive exactions of others.