坐禪三昧經 2.110

2.110

若菩薩心多思覺，常念阿那波那，入時出時數一乃至十，一一心不令馳散。菩薩從此門得一心，除五蓋欲行。

If a bodhisattva's mind has much discursive thought, he constantly remains mindful of ānāpāna, counting from one up to ten as the breath enters and exits, with each single thought not allowing it to scatter. From this gate, the bodhisattva attains single-mindedness, eliminating the five hindrances and desire-action.