Reference for Psalms 57:1

לַמְנַצֵּ֣חַ אַל־תַּ֭שְׁחֵת לְדָוִ֣ד מִכְתָּ֑ם בְּבָרְח֥וֹ מִפְּנֵי־שָׁ֝א֗וּל בַּמְּעָרָֽה׃

For the Leader; Al-tashheth. [A Psalm] of David; Michtam; when he fled from Saul, in the cave.