The quote below defines Vitarka-vicara as:

• Ardency (atappa) + mindfulness (sati) => combines to make vitakka
• Ardency (atappa) + alertness (sampajañña) => combines to make vicara

As Ajaan Lee, my teacher’s teacher, once noted, mindfulness combined with ardency turns into the concentration factor called vitakka, or directed thought, where you keep your thoughts consistently focused on one object, such as the breath. Alertness combined with ardency turns into another concentration factor: vicāra, or evaluation

Head & Heart Together, by Ṭhānissaro Bhikkhu, Chapter: Mindfulness Defined

What are the Tipitaka, commentary, sub commentary sources, including primary, secondary or tertiary source, which defines Vitarka-vicara as such?

Are there other definitions of Vitarka-vicara from Tipitaka, commentaries, sub commentaries, including primary, secondary or tertiary source?