The Tipiṭaka in Three Languages

Suññatavāra

Abhidhammapiṭaka · Dhammasaṅgaṇī · Vol. 34 · Section 203

[203] What at that time is sustained thought (vicāra)? That which at that time is ranging (cāra), sustained thought (vicāra), continued thought (anuvicāra), close examination (upavicāra), the continuous connection (anusandhanatā) and continuous pondering (anupekkhanatā) of the mind (citta) — this is the sustained thought that there is at that time.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 5 other places