B.G 18.28

ayuktaḥ prākṛtaḥ stabdhaḥ śaṭho naiṣkṛtiko'lasaḥ। viṣādī dīrghasūtrī ca kartā tāmasa ucyate ॥28॥

A person who is uncoordinated, unrefined, stubborn, deceitful, malicious, lazy, despondent, procrastinating, and a grudge-holder is referred to as a 'tāmas', i.e. dark doer.

Gīta Tātparya 18.28

The one who has not been elevated through the power of devotion to the Lord is indeed ordinary, and is a 'dīrghasūtrī' i.e. procrastinates, thinking, 'I will do it later'. A lazy and procrastinating (dīrghasūtrī) person, though endowed with some goodness, is considered to be of a dark nature. An unfit, passionate, stubborn, natural, deceitful, and wicked person is of a passionate nature. It is said that with each fault, one descends into darkness, leading to a wretched human state, then to an animal state, and finally into complete darkness. This is the result in sequence.

"bhagavadbhaktisāmarthyāt prakṛṣṭo na kṛto hi yaḥ। sa prākṛto dīrghasūtrī kuryāṃ paścāditi smaran॥"

"The one who has not been elevated through the power of devotion to the Lord is indeed ordinary, and is a 'dīrghasūtrī' i.e. procrastinates, thinking, 'I will do it later'."

iti śabdattattve।

- stated thus in the ancient text of 'Shabdattattva' i.e. 'essence of the word'.

prāptakālasyaiva karmaṇo dīrghakālenaiva kṛtiṁ sūcayan dīrghasūtrītyarthaḥ।

The meaning is that the term 'dīrghasūtrī' indicates the action of a right type after a long delay.

"alaso dīrghasūtrī ca sattvayuk tāmaso mataḥ। ayukto rājasaḥ stabdhaḥ prākṛto naikṛtiḥ śaṭhaḥ॥

ekaikenaiva doṣeṇa proktaḥ tāmasatāmasaḥ। durnarattvaṃ ca tiryaktvaṃ tamaścaitatphalaṃ kramāt॥"

"A lazy and procrastinating (dīrghasūtrī) person, though endowed with some goodness, is considered to be of a dark nature. An unfit, passionate, stubborn, natural, deceitful, and wicked person is of a passionate nature. It is said that with each fault, one descends into darkness, leading to a wretched human state, then to an animal state, and finally into complete darkness. This is the result in sequence."

iti ca॥

- stated thus as well.