In Isa 40:31, the word translated "wait" is:
- Hebrew: קוֹיֵ֤ (weqow) whose lexical form is קָוָה (qavah) meaning "to wait". This occurs elsewhere in the Hebrew such as Gen 1:9, 49:18, Job 3:9, 6:19, 7:2, 17:13, 30:26, Ps 25:3, 5, 21, 27:14, 37:9, etc.
- Greek LXX: ὑπομένοντες (hupomenontes) whose lexical form is ὑπομένω (hupomeno) meaning "(a) I remain behind, (b) I stand my ground, show endurance, (c) I endure, bear up against, persevere" (Strongs).
Isa 40:13 is not quoted in the NT anywhere. However, there may be an allusion to this verse (and possibly also Ps 37:9, 123:2, Isa 30:18, Zeph 3:8 ??) in places like Matt 10:22, 24:13, Mark 13:13, Rom 12:12, 1 Cor 12:12, 13:7, etc, (and possibly) 1 Cor 1:7, 4:5, James 5:7.